RE: Lost ofall redo logs
Tom, I did a quick test a couple of years ago (I think it was on 7.3.4) and found that when starting up after a clean shutdown Oracle doesn't actually read the redo logs, it just needs the files in the right location. Three step test. 1. Clean shutdown (immediate) of small test db. Removed redo logs. Startup had error. 2. Clean shutdown (immediate) of small test db. Shuffled redo logs (renamed log1--log2; log2--log3; log3--log1). Startup OK. 3. Shutdown abort of small test db. Shuffled redo logs. Startup had error. Don't remember why I needed to know this. Maybe just curiosity. Henry -Original Message- Thomas F Sent: Friday, September 20, 2002 12:39 PM To: Multiple recipients of list ORACLE-L Naveen, Why NOT take the redo log files in a cold backup? If you restore these cold backup files and intend to use them, you would then have to open the database with the RESET LOGS option to re-create the redo logs. This would then invalidate all of your archive log files. And Joe - thanks! :) Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 11:29 AM To: Multiple recipients of list ORACLE-L I'm not an expert so pardon me if i'm wrong. Why to copy the log files in case of a cold backup if the instance was shutdown cleanly(NOT ABORT)?? The d/b will be consistent so we don't need the redo-log files, isn't it? Isn't it that the DB update all the Datafiles headers with the checkpoint information at the time of CLEAN SHUTDOWN so redo-logs are not required for a restore from cold backup? Though no harm in taking the log files backup too but they are not really needed? Regards, Naveen -Original Message- Sent: Friday, September 20, 2002 7:18 PM To: Multiple recipients of list ORACLE-L Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only
Backing up redo logs WAS: Lost ofall redo logs
Technically, after a consistent shutdown, the redo logs are not needed. All transactions have been completed thus no redo is necessary. However, I consider a full backup to include redo logs and control files. The issue is not whether the database needs them for recovery, but whether the dba needs them to speed recovery. A full restore of database from cold backup is required. Yes, the online logs are not needed and can be recreated from scratch. However, there is less human intervention and thus less room for error if all the files are restored from tape (or other) and the database opened. Just these two steps are required. For any backup, you should never backup an active redo log. This is one where redo is being written. If you are doing cold backups, the database is not writing redo, so there are no active logs. If you are doing hot backups, you will need to get all of the redo from archived logs that covers the time period from just before the first tablespace was placed in backup mode to just after the last tablespace was taken out of backup mode. Consider the small size of most redo logs compared with the possibility of loss and I'll back them up every time. Dan -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Fink, Dan INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Lost ofall redo logs
Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California--
RE: Lost ofall redo logs
Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB
RE: Lost ofall redo logs
I'm not an expert so pardon me if i'm wrong. Why to copy the log files in case of a cold backup if the instance was shutdown cleanly(NOT ABORT)?? The d/b will be consistent so we don't need the redo-log files, isn't it? Isn't it that the DB update all the Datafiles headers with the checkpoint information at the time of CLEAN SHUTDOWN so redo-logs are not required for a restore from cold backup? Though no harm in taking the log files backup too but they are not really needed? Regards, Naveen -Original Message- Sent: Friday, September 20, 2002 7:18 PM To: Multiple recipients of list ORACLE-L Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]
RE: Lost ofall redo logs
Naveen, Why NOT take the redo log files in a cold backup? If you restore these cold backup files and intend to use them, you would then have to open the database with the RESET LOGS option to re-create the redo logs. This would then invalidate all of your archive log files. And Joe - thanks! :) Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 11:29 AM To: Multiple recipients of list ORACLE-L I'm not an expert so pardon me if i'm wrong. Why to copy the log files in case of a cold backup if the instance was shutdown cleanly(NOT ABORT)?? The d/b will be consistent so we don't need the redo-log files, isn't it? Isn't it that the DB update all the Datafiles headers with the checkpoint information at the time of CLEAN SHUTDOWN so redo-logs are not required for a restore from cold backup? Though no harm in taking the log files backup too but they are not really needed? Regards, Naveen -Original Message- Sent: Friday, September 20, 2002 7:18 PM To: Multiple recipients of list ORACLE-L Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED]
RE: Lost ofall redo logs
My long standing position on this is that you take backups so that Just in case something fails, you have the ability to recover. If something has failed, I want backups of EVERYTHING. I know I dont' need the redo logs, but I would feel awful silly if I needed them at some point but didn't back them up because I understood backup and recovery principles. -Original Message- Nahata Sent: Friday, September 20, 2002 8:29 AM To: Multiple recipients of list ORACLE-L I'm not an expert so pardon me if i'm wrong. Why to copy the log files in case of a cold backup if the instance was shutdown cleanly(NOT ABORT)?? The d/b will be consistent so we don't need the redo-log files, isn't it? Isn't it that the DB update all the Datafiles headers with the checkpoint information at the time of CLEAN SHUTDOWN so redo-logs are not required for a restore from cold backup? Though no harm in taking the log files backup too but they are not really needed? Regards, Naveen -Original Message- Sent: Friday, September 20, 2002 7:18 PM To: Multiple recipients of list ORACLE-L Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL
Re: Lost ofall redo logs
I agree, there is never a problem because you backed up redo log files. There could be a problem with inadvertently restoring them, covering up needed information in the current online redo logs. John [EMAIL PROTECTED] wrote: My long standing position on this is that you take backups so that Just incase something fails, you have the ability to recover. If something hasfailed, I want backups of EVERYTHING. I know I dont' need the redo logs,but I would feel awful silly if I needed them at some point but didn't backthem up because I "understood" backup and recovery principles.-Original Message-NahataSent: Friday, September 20, 2002 8:29 AMTo: Multiple recipients of list ORACLE-LI'm not an expert so pardon me if i'm wrong.Why to copy the log files in case of a cold backup if the instance wasshutdown cleanly(NOT ABORT)??The d/b will be consistent so we don't need the redo-log files, isn't it?Isn't it that the DB update all the Datafiles headers with the checkpointinformation at the time of CLEAN SHUTDOWN so redo-logs are not required forarestore from cold backup?Though no harm in taking the log files backup too but they are not reallyneeded?Regards,Naveen-Original Message-Sent: Friday, September 20, 2002 7:18 PMTo: Multiple recipients of list ORACLE-LWell, it didn't sound like he was using Rman (which does not backup redologs). So I assumed that he was/should be using a cold-backup strategy -which, if it were me, would backup the redo logs.Tom MercadanteOracle Certified Professional-Original Message-Sent: Friday, September 20, 2002 8:48 AMTo: Multiple recipients of list ORACLE-LTom, that statement will open a can of worms(like a religion following)about if/when to backup redo logs. :)joeMercadante, Thomas F wrote: I agree with you Joe.I would *never* use an undocumented parameter unless Oracle told me to (orunless I was testing something that I could recreate).Using these params on the advice of someone from this list is verydangerous.The larger question is, why are the redo logs not being backed up?Arun, you need to establish a backup policy *immediately* so that you arenot being put into this position again.Tom MercadanteOracle Certified Professional-Original Message-Sent: Thursday, September 19, 2002 7:48 AMTo: Multiple recipients of list ORACLE-LKG, doesn't anyone think not having a backup is a bad thing.You can go down that route if you wish but as I remember undocumentedparameters are best used with the assistance of OWS and not just used atwill.joeK Gopalakrishnan wrote: Arun:You are right. The original poster *clearly* saidLOST ALL REDO LOGSNO BACKUP.In the above situation, you have to open thedatabases using the some special tricks andI don't think you need to go back and referBAckup and Recovery Manuals (You can notfind anything for this situation, that isanother story)Those parameters will bring up the databaseif the database is cleanly shudowned (read:Shutdown Normal/Immediate) and you willhave to do some more tricks to get thedatabase up if it is crashed (read: shutdownABORT).I don't think it is a bad advice..YMMVKG-Original Message-ChakrapaniraoSent: Wednesday, September 18, 2002 11:08 PMTo: Multiple recipients of list ORACLE-LWell one I do want to make clear I have never tried to give bad advice topeople.Since the user in his mail had said that he does not have a ba ckup and does not have any online redo logs can you please let me know how else can heopen the database, when he said he does not have a back it assumes that hedoes not have a os backup and also the rman backup.This might be the undocumented thing but this Is the only way it worksAnd this had happened in one our case and the only way we could open thedatabase is to force open the database in a corrupt mode take an export and import back into the new database.If you still think I am trying to give a bad advice well sorry that I amgiving bad advices.-Original Message-Sent: Thursday, September 19, 2002 12:33 AMTo: Multiple recipients of list ORACLE-LArun, since WHEN has been using undocumented parameters the normal wayof doing things, I think you need to go back and lookup backup/recoveryconcepts.Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new.joeArun Chakrapanirao wrote: The only way u can open your database is to add a parameter fileas_allow_resetlogs_corruption=TRUE_corrupted_rollback_segments= TRUE_offline_rollback_segments=(the rollback segment names)activate the database and then immediately take an export of the wholedatabase.Create a new database and then import all the data to this new database.-Original Message-Sent: Wednesday, September 18,
RE: Lost ofall redo logs
John, seeing as your e-mail name is Ora NT DBA, you probably should have qualified your reply with as long as the DB is down. Backing up live Oracle files on Windows (even NTFS) is a recipe for disaster due to locking problems (with the OS/filesystem or the backup software, I'm not sure). We had this problem long ago and was such a pain that we dumped Oracle7 from Winders to Unix and haven't looked back. Rich Jesse System/Database Administrator [EMAIL PROTECTED] Quad/Tech International, Sussex, WI USA -Original Message- Sent: Friday, September 20, 2002 1:30 PM To: Multiple recipients of list ORACLE-L I agree, there is never a problem because you backed up redo log files. There could be a problem with inadvertently restoring them, covering up needed information in the current online redo logs. John -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Jesse, Rich INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
Thomas, If you rely on the premise that cold backups can only be taken after a non-abort shutdown, then there is no reason to backup on-line redo logs. (If you rely on backing up redo because you do cold backups after shutdown abort, well, then we can have an argument about best practices.) In fact, given a proper backup strategy, there is no point at which you should need to restore an on-line redo log from backup, and, in fact, about any scencario I can think of, restoring online redo logs is either detrimental to, or has no impact on, your recovery. Specifically, in the scenario you indicate, (cold backup, archive logs, rolling forward to a point in time), there is no need for the on-line redo. After restoring the datafiles, you'll need to apply your archives (which will still be valid against the incarnation of the database that you're working with), when you reach the desired point-in-time, you'll need to cancel recovery and then open reset logs. Note that this will happen regardless of whether you previously restored them from backup. Don't backup on-line redo logs! With cold backups, it's not necessary, with hot backups, it's not only unnecessary, it's dangerous! -Mark On Fri, 2002-09-20 at 12:38, Mercadante, Thomas F wrote: Naveen, Why NOT take the redo log files in a cold backup? If you restore these cold backup files and intend to use them, you would then have to open the database with the RESET LOGS option to re-create the redo logs. This would then invalidate all of your archive log files. And Joe - thanks! :) Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 11:29 AM To: Multiple recipients of list ORACLE-L I'm not an expert so pardon me if i'm wrong. Why to copy the log files in case of a cold backup if the instance was shutdown cleanly(NOT ABORT)?? The d/b will be consistent so we don't need the redo-log files, isn't it? Isn't it that the DB update all the Datafiles headers with the checkpoint information at the time of CLEAN SHUTDOWN so redo-logs are not required for a restore from cold backup? Though no harm in taking the log files backup too but they are not really needed? Regards, Naveen -Original Message- Sent: Friday, September 20, 2002 7:18 PM To: Multiple recipients of list ORACLE-L Well, it didn't sound like he was using Rman (which does not backup redo logs). So I assumed that he was/should be using a cold-backup strategy - which, if it were me, would backup the redo logs. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Friday, September 20, 2002 8:48 AM To: Multiple recipients of list ORACLE-L Tom, that statement will open a can of worms(like a religion following) about if/when to backup redo logs. :) joe Mercadante, Thomas F wrote: I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the
RE: Lost ofall redo logs
Hey Gilberto, I was just yanking your chain with the CV line. Well done for getting the thing back Regards Lee -Original Message- Sent: 19 September 2002 19:08 To: Multiple recipients of list ORACLE-L Hi People I don't think that i need to update my CV, since I don't administer the database in subject and that am trying to solve the an unhappy customer's problem. I had already researched and tried almost everything that you suggested me and what really solved went use to suggestion of the not documented parameter (_allow_resetlogs_corruption), then do a full export, then recreate the database and do a full import. I think that this list is wonderful, whenever I had a problem and I didn't get to solve I asked help here and I went very well assisted, much better than the oracle support. Thank you! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). * The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please re-send this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Robertson Lee - lerobe INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
update your CV -Original Message- Sent: 18 September 2002 21:30 To: Multiple recipients of list ORACLE-L Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). * The information contained in this communication is confidential, is intended only for the use of the recipient named above, and may be legally privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please re-send this communication to the sender and delete the original message or any copy of it from your computer system. Thank You. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Robertson Lee - lerobe INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
And preferably, forget about this little incident when doing so...;-) On Thu, 2002-09-19 at 05:43, Robertson Lee - lerobe wrote: update your CV -Original Message- Sent: 18 September 2002 21:30 To: Multiple recipients of list ORACLE-L Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- -- Mark J. Bobak Oracle DBA [EMAIL PROTECTED] It is not enough to have a good mind. The main thing is to use it well. -- Rene Descartes -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Mark J. Bobak INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
If you lost the redo logs *after* you shutdown the database, you can do the following to re-create them: 1. As DBA: startup mount; 2. alter database backup controlfile to trace; 3. select * from v$controlfile; 4. shutdown 5. Delete the controlfiles identified by (3) as these need to be re-created. 6. Edit the tracefile created by (2) to look something like the following: STARTUP NOMOUNT CREATE CONTROLFILE SET DATABASE SID RESETLOGS NOARCHIVELOG MAXLOGFILES 6 MAXLOGMEMBERS 2 MAXDATAFILES 64 MAXINSTANCES 1 MAXLOGHISTORY 226 LOGFILE GROUP 1 '/usr4/oradata/SID/redoSID01a.log' SIZE 50M, GROUP 2 '/usr4/oradata/SID/redoSID02a.log' SIZE 50M, GROUP 3 '/usr4/oradata/SID/redoSID03a.log' SIZE 50M, GROUP 4 '/usr4/oradata/SID/redoSID04a.log' SIZE 50M DATAFILE '/usr1/oradata/SID/system_01.dbf', '/usr2/oradata/SID/users_01.dbf', '/usr3/oradata/SID/users_indexes_01.dbf', '/usr3/oradata/SID/rollback_01.dbf' CHARACTER SET WE8ISO8859P1 ; ALTER DATABASE OPEN RESETLOGS; ALTER TABLESPACE TEMP ADD TEMPFILE '/usr1/oradata/SID/temp_01.dbf' REUSE; ie. i. Remove leading comments and lines beginning with # ii. In the CREATE CONTROLFILE line change REUSE to SET and NORESETLOGS to RESETLOGS iii.Get rid of RECOVER DATABASE iv. Change ALTER DATABASE OPEN to ALTER DATABASE OPEN RESETLOGS (v. Ignore ALTER TABLESPACE stuff if you are not using LMT temporary tablespaces.) 7. Now go into SQL*Plus as DBA and run the script, which should build new controlfiles, re-create the log files and open the database. Remember to back up everything you *do* have before starting. This will not work if you lost the redo logs before you shutdown the database. - Bill. - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bill Buchan INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Lost ofall redo logs
As I stated earlier, right out of the user managed recover docs(loss of all online redo logs): you'll need to do the restore from backup, using what archivelogs available roll forward to point of last archived log and open resetlogs --- the abbreviated version. joe Recovering After the Loss of All Members of an Online Redo Log Group If a media failure damages all members of an online redo log group, then different scenarios can occur depending on the type of online redo log group affected by the failure and the archiving mode of the database. If the damaged log group is inactive, then it is not needed for crash recovery; if it is active, then it is needed for crash recovery. *If the group is . . .* *Then . . .* *And you should . . .* Inactive It is not needed for crash recovery Clear the archived or unarchived group. Active It is needed for crash recovery Attempt to issue a checkpoint and clear the log; if impossible, then you must restore a backup and perform incomplete recovery up to the most recent available log. Current It is the log that Oracle is currently writing to Attempt to clear the log; if impossible, then you must restore a backup and perform incomplete recovery up to the most recent available log. Your first task is to determine whether the damaged group is active or inactive. *Loss of Multiple Redo Log Groups* If you have lost multiple groups of the online redo log, then use the recovery method for the most difficult log to recover. The order of difficulty, from most difficult to least difficult, follows: 1. The current online redo log 2. An active online redo log 3. An unarchived online redo log 4. An inactive online redo log Arun Chakrapanirao wrote: Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network
Re: Lost ofall redo logs
KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joe Testa INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services
RE: Lost ofall redo logs
Joe: I understand what you say.. But the situation is very bad. He does **NOT** have ANY backups. KG -Original Message- Sent: Thursday, September 19, 2002 4:43 AM To: Multiple recipients of list ORACLE-L As I stated earlier, right out of the user managed recover docs(loss of all online redo logs): you'll need to do the restore from backup, using what archivelogs available roll forward to point of last archived log and open resetlogs --- the abbreviated version. joe Recovering After the Loss of All Members of an Online Redo Log Group If a media failure damages all members of an online redo log group, then different scenarios can occur depending on the type of online redo log group affected by the failure and the archiving mode of the database. If the damaged log group is inactive, then it is not needed for crash recovery; if it is active, then it is needed for crash recovery. *If the group is . . .* *Then . . .* *And you should . . .* Inactive It is not needed for crash recovery Clear the archived or unarchived group. Active It is needed for crash recovery Attempt to issue a checkpoint and clear the log; if impossible, then you must restore a backup and perform incomplete recovery up to the most recent available log. Current It is the log that Oracle is currently writing to Attempt to clear the log; if impossible, then you must restore a backup and perform incomplete recovery up to the most recent available log. Your first task is to determine whether the damaged group is active or inactive. *Loss of Multiple Redo Log Groups* If you have lost multiple groups of the online redo log, then use the recovery method for the most difficult log to recover. The order of difficulty, from most difficult to least difficult, follows: 1. The current online redo log 2. An active online redo log 3. An unarchived online redo log 4. An inactive online redo log Arun Chakrapanirao wrote: Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also
RE: Lost ofall redo logs
I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing
Fw: Lost ofall redo logs
Oh yeah! How could I forget: make darn sure that you are working with Oracle Support actively, step-by-step, if you are in a scenario which might call for the use of these parameters. It would be *disastrous* to start down this road if unnecessary, and there are other quirks when using them that only OWS can diagnose and overcome... ...need my coffee, NOW! - Original Message - From: Tim Gorman To: [EMAIL PROTECTED] Sent: Thursday, September 19, 2002 7:03 AM Subject: Re: Lost ofall redo logs One correction... The undocumented "_corrupted_rollback_segments" parameterdoes not take a TRUE/FALSE value setting. It is another list of rollback segment names (similar to "rollback_segments" and "_offline_rollback_segments") which will be considered corrupted. Roughly, the meaning of these undocumented parameters is (and I'm doing this from memory and pre-morning-coffeeso those who know please correct as needed): rollback_segments List of rollback segment names on which to perform ALTER ROLLBACK SEGMENT ... ONLINE immediately after opening the database instance. _offline_rollback_segments List of rollback segments names to not scan during OPEN in order to mark transactions as "DEAD" (uncommitted) or "ROLLED BACK" (during instance recovery). Also, these RBS will not be used for any new transactions and cannot be brought online. Since these RBS do not have any DEAD transactions after OPEN, then SMON will not attempt rollback any txnsbehind the scenes. If, while the instance is open, an entry in an ITL in a database block refers to one of these RBS, then the server process will attempt to read the transaction table in the RBS header and also attempt to read undo blocks in the RBS body in order to rollback the transaction orachieve a consistent read. Please note that this is *dangerous* and that the instance can become "hung" through infinite loops and other nasty stuff while this is being performed. In this event, the instance may have to be killed and the RBS involved may have to be listed in the "_corrupted_rollback_segment" parameter if there is any hope of using the database again... _corrupted_rollback_segments Another list of rollback segments to not scan during OPEN and not allow online after OPEN. Transaction table is not scanned (as with "_offline_") during instance recovery and transactions within are not rolled back or marked DEAD, ever. If, after the instance is open, an entry in an ITL in a database block refers to one of these RBS, then the server process will *not* attempt to reference the RBS in order to rollback the transaction or achieve a consistent read. Instead, the changes from the transaction will be marked as "committed" as is. I'm sure that you can all see the danger in using these parameters. Transactions that should be rolled back will not be. With "_offline", the database will attempt to use info within the RBS but will never allow the RBS to be brought online for new transactions. You use "_offline" if you think you can get away with salvaging the data in the RBS. With "_corrupted", there is no hope, which is usually the situation if the header block of the RBS is corrupted. In this case, the "after-image" data stored in the data segments (i.e. table, cluster, and index) are considered as "committed", since there is no way to tell if they really were or weren't. The fact that the "after-images" may have been incomplete only adds to the fun and excitement... As Arun had indicated (but not fully enough!), a database opened with either of these parameters really cannot be "trusted" for future use. The firm recommendation is to use the database instance thus opened merely to salvage as much data as possible for import (one way or another) into a freshly-created new database. Using these parameters will put the database on life-support for a short time only, hopefully long enough to extract its data. It would be foolish to entrust new data to it ever again... Hope this helps... -Tim - Original Message - From: "K Gopalakrishnan" [EMAIL PROTECTED] To: "Multiple recipients of list ORACLE-L" [EMAIL PROTECTED] Sent: Thursday, September 19, 2002 12:58 AM Subject: RE: Lost ofall redo logs Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read:
Re: Lost ofall redo logs
There is the other expensive avenue of calling in Oracle and the DUL team. It depends on the criticality of the data. A few years ago a former dba here had the experience and it is said to have cost a mere $20K. Maybe the data is worth more than that. On Wed, Sep 18, 2002 at 10:08:19PM -0800, Arun Chakrapanirao wrote: Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don?t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joe Testa INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Arun Chakrapanirao INET: [EMAIL PROTECTED]
RE: Lost ofall redo logs
This is very rare that one would loose every online log files for the instance. Hey, I don't think the advice here could be bad, it is the discretion of the user who is going to use it. KG and/or Arun, Anyways, I'm more interested in KG's comment about you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). Could you please elaborate please? Thanks, Viral Desai. From: Mercadante, Thomas F [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Subject: RE: Lost ofall redo logs Date: Thu, 19 Sep 2002 05:13:27 -0800 I agree with you Joe. I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate). Using these params on the advice of someone from this list is very dangerous. The larger question is, why are the redo logs not being backed up? Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L KG, doesn't anyone think not having a backup is a bad thing. You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will. joe K Gopalakrishnan wrote: Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services
Re: Lost ofall redo logs
One correction... The undocumented "_corrupted_rollback_segments" parameterdoes not take a TRUE/FALSE value setting. It is another list of rollback segment names (similar to "rollback_segments" and "_offline_rollback_segments") which will be considered corrupted. Roughly, the meaning of these undocumented parameters is (and I'm doing this from memory and pre-morning-coffeeso those who know please correct as needed): rollback_segments List of rollback segment names on which to perform ALTER ROLLBACK SEGMENT ... ONLINE immediately after opening the database instance. _offline_rollback_segments List of rollback segments names to not scan during OPEN in order to mark transactions as "DEAD" (uncommitted) or "ROLLED BACK" (during instance recovery). Also, these RBS will not be used for any new transactions and cannot be brought online. Since these RBS do not have any DEAD transactions after OPEN, then SMON will not attempt rollback any txnsbehind the scenes. If, while the instance is open, an entry in an ITL in a database block refers to one of these RBS, then the server process will attempt to read the transaction table in the RBS header and also attempt to read undo blocks in the RBS body in order to rollback the transaction orachieve a consistent read. Please note that this is *dangerous* and that the instance can become "hung" through infinite loops and other nasty stuff while this is being performed. In this event, the instance may have to be killed and the RBS involved may have to be listed in the "_corrupted_rollback_segment" parameter if there is any hope of using the database again... _corrupted_rollback_segments Another list of rollback segments to not scan during OPEN and not allow online after OPEN. Transaction table is not scanned (as with "_offline_") during instance recovery and transactions within are not rolled back or marked DEAD, ever. If, after the instance is open, an entry in an ITL in a database block refers to one of these RBS, then the server process will *not* attempt to reference the RBS in order to rollback the transaction or achieve a consistent read. Instead, the changes from the transaction will be marked as "committed" as is. I'm sure that you can all see the danger in using these parameters. Transactions that should be rolled back will not be. With "_offline", the database will attempt to use info within the RBS but will never allow the RBS to be brought online for new transactions. You use "_offline" if you think you can get away with salvaging the data in the RBS. With "_corrupted", there is no hope, which is usually the situation if the header block of the RBS is corrupted. In this case, the "after-image" data stored in the data segments (i.e. table, cluster, and index) are considered as "committed", since there is no way to tell if they really were or weren't. The fact that the "after-images" may have been incomplete only adds to the fun and excitement... As Arun had indicated (but not fully enough!), a database opened with either of these parameters really cannot be "trusted" for future use. The firm recommendation is to use the database instance thus opened merely to salvage as much data as possible for import (one way or another) into a freshly-created new database. Using these parameters will put the database on life-support for a short time only, hopefully long enough to extract its data. It would be foolish to entrust new data to it ever again... Hope this helps... -Tim - Original Message - From: "K Gopalakrishnan" [EMAIL PROTECTED] To: "Multiple recipients of list ORACLE-L" [EMAIL PROTECTED] Sent: Thursday, September 19, 2002 12:58 AM Subject: RE: Lost ofall redo logs Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me
Re: Lost ofall redo logs
Hi People I don't think that i need to update my CV, since I don't administer the database in subject and that am trying to solve the an unhappy customer's problem. I had already researched and tried almost everything that you suggested me and what really solved went use to suggestion of the not documented parameter (_allow_resetlogs_corruption), then do a full export, then recreate the database and do a full import. I think that this list is wonderful, whenever I had a problem and I didn't get to solve I asked help here and I went very well assisted, much better than the oracle support. Thank you! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Lost ofall redo logs
Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Lost ofall redo logs
What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
Gilberto - Is your database still up, or is it down? Dennis Williams DBA Lifetouch, Inc. [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] -Original Message- Sent: Wednesday, September 18, 2002 3:30 PM To: Multiple recipients of list ORACLE-L Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: DENNIS WILLIAMS INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
The most important - do not panic. Than, read note 94119.1 on MetaLink. Here is a part of it: Recovery with missing online redo logs Missing online redo logs means that somehow you have lost your redo logs before they had a chance to archived. This means that crash recovery cannot be performed, so media recovery is required instead. All datafiles will need to berestored and rolled forwarded until the last available archived log file is applied. This is thus an incomplete recovery, and as such, the recover database command is necessary. (i.e. you cannot do a datafile or tablespace recovery). As always, when an incomplete recovery is performed, you must open the database with resetlogs. Note: the best way to avoid this kind of a loss, is to mirror your online log files. Recovery with missing archived redo logs If your archives are missing, the only way to recover the database is to restore from your latest backup. You will have lost any uncommitted transactions which were recorded in the archived redo logs. Again, this is why Oracle strongly suggests mirroring your online redo logs and duplicating copies of the archives. Recovery with resetlogs option Reset log option should be the last resort, however, as we have seen from above, it may be required due to incomplete recoveries. (recover using a backup control file, or a point in time recovery). It is imperative that you backup up the database immediately after you have opened the database with reset logs. The reason is that oracle updates the control file and resets log numbers, and you will not be able to recover from the old logs. The next concern will be if the database crashes after you have opened the database with resetlogs, but have not had time to backup the database. How to recover? Shut down the database Backup all the datafiles and the control file Startup mount Alter database open resetlogs This will work, because you have a copy of a control file after the esetlogs point. Media failure before a backup after resetlogs. If a media failure should occur before a backup was made after you opened the database using resetlogs, you will most likely lose data. The reason is because restoring a lost datafile from a backup prior to the resetlogs will give an error that the file is from a point in time earlier, and you don't have its backup log anymore. Good luck. inka -Original Message- Sent: Wednesday, September 18, 2002 4:44 PM To: Multiple recipients of list ORACLE-L What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Inka Bezdziecka INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY,
Re: Lost ofall redo logs
There is a way to reconstruct this files? or startup and reconstruct ? The database is in noarchivelog... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re[2]: Lost ofall redo logs
Gilberto, Can we assume that the database crashed in the middle of the day or did this happen when things were quite? I believe you may be in an unrecoverable situation where you will have to go back to the last cold backup, but you say that you have no backup which does not give me a good feeling. Is this production, test, or development? Dick Goulet Reply Separator Author: Gilberto Gampert [EMAIL PROTECTED] Date: 9/18/2002 1:28 PM There is a way to reconstruct this files? or startup and reconstruct ? The database is in noarchivelog... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don't have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Arun Chakrapanirao INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Lost ofall redo logs
Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Re: Lost ofall redo logs
Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joe Testa INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
RE: Lost ofall redo logs
Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don´t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joe Testa INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Arun Chakrapanirao INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also
RE: Lost ofall redo logs
Arun: You are right. The original poster *clearly* said LOST ALL REDO LOGS NO BACKUP. In the above situation, you have to open the databases using the some special tricks and I don't think you need to go back and refer BAckup and Recovery Manuals (You can not find anything for this situation, that is another story) Those parameters will bring up the database if the database is cleanly shudowned (read: Shutdown Normal/Immediate) and you will have to do some more tricks to get the database up if it is crashed (read: shutdown ABORT). I don't think it is a bad advice.. YMMV KG -Original Message- Chakrapanirao Sent: Wednesday, September 18, 2002 11:08 PM To: Multiple recipients of list ORACLE-L Well one I do want to make clear I have never tried to give bad advice to people. Since the user in his mail had said that he does not have a backup and does not have any online redo logs can you please let me know how else can he open the database, when he said he does not have a back it assumes that he does not have a os backup and also the rman backup. This might be the undocumented thing but this Is the only way it works And this had happened in one our case and the only way we could open the database is to force open the database in a corrupt mode take an export and import back into the new database. If you still think I am trying to give a bad advice well sorry that I am giving bad advices. -Original Message- Sent: Thursday, September 19, 2002 12:33 AM To: Multiple recipients of list ORACLE-L Arun, since WHEN has been using undocumented parameters the normal way of doing things, I think you need to go back and lookup backup/recovery concepts. Feel free to read both user managed and RMAN backup recovery docs/scenarios. You are giving bad advice to people on the list who might be new. joe Arun Chakrapanirao wrote: The only way u can open your database is to add a parameter file as _allow_resetlogs_corruption=TRUE _corrupted_rollback_segments= TRUE _offline_rollback_segments=(the rollback segment names) activate the database and then immediately take an export of the whole database. Create a new database and then import all the data to this new database. -Original Message- Sent: Wednesday, September 18, 2002 5:23 PM To: Multiple recipients of list ORACLE-L Nop, all redo logs gone away... - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 5:43 PM What about mirrored redo group members? Igor Neyman, OCP DBA [EMAIL PROTECTED] - Original Message - To: Multiple recipients of list ORACLE-L [EMAIL PROTECTED] Sent: Wednesday, September 18, 2002 4:30 PM Hi people... What to do if I have LOST ALL REDO LOGS and i don4t have any backup? Thanks in advance! : Gilberto Gampert Universidade de Passo Fundo Administrador de Banco de Dados Passo Fundo - RS - Bra5il [EMAIL PROTECTED]http://www.upf.br : -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Gilberto Gampert INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Igor Neyman INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Joe Testa INET: [EMAIL PROTECTED] Fat City Network Services-- 858-538-5051 http://www.fatcity.com San Diego, California-- Mailing list and web hosting services - To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing
