Re: SAME, WAFL and RAID
Certainly. I had forgotten about the attachment policy. Please find James' paper on http://miracleas.dk/DBF/Morle/Sane_SAN_WP.pdf . I've CC'ed James, who's an old friend of ours. He's the guy who wrote Scaling Oracle8i which is not a half bad book. Mogens C.S.Venkata Subramanian wrote: May I please have a copy of this paper?Thanks -Original Message-Sent: Wednesday, January 16, 2002 00:38To: Multiple recipients of list ORACLE-LHi,WAFL is Write Anywhere File Layout...Its the file lay out used by snapshot supported storege Devices(NetApp Storege Etc), This is completely different from a RAID. A RAID is a system which may or maynot be h/w controlled. But WAFL is the Low level file layoutof the Storege system. In any one wants i hv the paper or Hutchinston with me on WAFL which i can give uRegardsOraEtM!!
RE: SAME, WAFL and RAID
May I please have a copy of this paper? Thanks -Original Message- Sent: Wednesday, January 16, 2002 00:38 To: Multiple recipients of list ORACLE-L Hi, WAFL is Write Anywhere File Layout... Its the file lay out used by snapshot supported storege Devices(NetApp Storege Etc), This is completely different from a RAID. A RAID is a system which may or maynot be h/w controlled. But WAFL is the Low level file layout of the Storege system. In any one wants i hv the paper or Hutchinston with me on WAFL which i can give u Regards OraEtM!! _ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Eswar the MAD INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Hatzistavrou Giannis INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
I think that you just run into : RAIC: Redundant Array of Independent Consultants. Yechiel Adar, Mehish Computer Services [EMAIL PROTECTED] -Original Message- From: Mohan, Ross [SMTP:[EMAIL PROTECTED]] Sent: Wed, January 16, 2002 2:01 AM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Yea, they were talking about clustering all right. sure uh huh right Whatever! -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 6:26 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID New one I heard at our local Oracle office : RAIP = Redundant Array of Independent Processors (Those guys were talking about NT Clustering... ) -Original Message- From: Mohan, Ross [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 4:41 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID SAME = 'stripe and mirror everthing' BHT = 'butylated hydroxytoluene' -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 5:29 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Great ! Thanks for the info.. - Kirti -Original Message- From: Nick Wagner [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 3:49 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID good question... RAID and WALF -- see below. SAME... no idea... RAID - (from http://www.uni-mainz.de/~neuffer/scsi/what_is_raid.html ) What does RAID stand for ? In 1987, Patterson, Gibson and Katz at the University of California Berkeley, published a paper entitled A Case for Redundant Arrays of Inexpensive Disks (RAID) . This paper described various types of disk arrays, referred to by the acronym RAID. The basic idea of RAID was to combine multiple small, inexpensive disk drives into an array of disk drives which yields performance exceeding that of a Single Large Expensive Drive (SLED). Additionally, this array of drives appears to the computer as a single logical storage unit or drive. The Mean Time Between Failure (MTBF) of the array will be equal to the MTBF of an individual drive, divided by the number of drives in the array. Because of this, the MTBF of an array of drives would be too low for many application requirements. However, disk arrays can be made fault-tolerant by redundantly storing information in various ways. Five types of array architectures, RAID-1 through RAID-5, were defined by the Berkeley paper, each providing disk fault-tolerance and each offering different trade-offs in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID-0 array. WAFL (from the NetApp website) The WAFL (Write Anywhere File Layout) file system and the following features deliver enterprise-class availability: Consistency points. Always a consistent file-system image on disk, even after unplanned shutdowns. Virtually eliminates the need to run time-consuming file-system checks. Snapshot technology. Snapshots are near-instantaneous, transparent, read-only, online copies of the active file systems. Up to 31 Snapshots can be maintained for each data volume. Users can quickly recover deleted or modified files without administrative assistance or restore from tape backup. The Snapshot function requires minimal disk space and causes no disruption of service. Snapshots can be backed up to other media while users are modifying the active file system to minimize business disruption. SnapRestore software. Allows any system to revert back to a specified data volume Snapshot for instant file-system recovery. Terabytes can be recovered in minutes, rather than hours, without going to tape. The software also greatly facilitates scenario testing as well as providing disaster recovery and virus protection. Easy, cost-effective clustering. Safeguards against hardware failures by automatic filer takeover. Gives users continuous access to data. SnapMirror software. Provides remote mirroring at high speeds over a LAN or WAN. The asynchronous mirroring can be used for disaster recovery
RE: SAME, WAFL and RAID
May I please have a copy of this paper? Thanks -Original Message- Sent: Wednesday, January 16, 2002 00:38 To: Multiple recipients of list ORACLE-L Hi, WAFL is Write Anywhere File Layout... Its the file lay out used by snapshot supported storege Devices(NetApp Storege Etc), This is completely different from a RAID. A RAID is a system which may or maynot be h/w controlled. But WAFL is the Low level file layout of the Storege system. In any one wants i hv the paper or Hutchinston with me on WAFL which i can give u Regards OraEtM!! -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: C.S.Venkata Subramanian INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Bill: I believe that WAFL and SAME are variations on the technology implemented for RAID. WAFL and SAME are new technologies adopted by smaller disk manufacturers as a way to complete against the RAID implementers like EMC, Network Appliance, etc. In my humble opinion, I would not bet the house on technology that you have not test-driven. I would suggest testing this stuff out and then asking them for references. As far as Gaja's paper, I have worked with Gaja for at least 6 years and believe his paper to apply quite nicely. It's not the type of disk implemented, its how you implement it. Thank You Stephen P. Karniotis Technical Alliance Manager Compuware Corporation Direct: (248) 865-4350 Mobile: (248) 408-2918 Email: [EMAIL PROTECTED] Web:www.compuware.com -Original Message- Sent: Tuesday, January 15, 2002 11:49 AM To: Multiple recipients of list ORACLE-L Subject:SAME, WAFL and RAID Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID (shake, rattle and roll? - sorry) file systems. We have some systems people pushing a vendor (Procom) and their WAFL filesystem as a platform for an Oracle data warehouse; showing them parts of Gaja's paper Implementing Raid on Oracle Systems resulted in the response of WAFL is different from Raid - this paper doesn't apply. I found a white paper Optimal Storage Configuration Made Easy on Technet, which advocates the SAME methodology, and am wondering about the differences among these configurations. Are WAFL and SAME the same(sic)? Are WAFL and/or SAME just other variants of Raid, or are the differences greater than the similarities? As always, any advice/comments are appreciated. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bill Becker INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Karniotis, Stephen INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
WAFL and SAME are not the same. WAFL stands for Write Anywhere File Layout. It is a Network Appliance proprietary system and they've trade marked WAFL. Coincidentally it's a RAID 4 NFS implementation. See: http://www.netapp.com/tech_library/3002.html#I3 Beware the marketing droids... -Original Message- Sent: Tuesday, January 15, 2002 10:40 AM To: Multiple recipients of list ORACLE-L Bill: I believe that WAFL and SAME are variations on the technology implemented for RAID. WAFL and SAME are new technologies adopted by smaller disk manufacturers as a way to complete against the RAID implementers like EMC, Network Appliance, etc. In my humble opinion, I would not bet the house on technology that you have not test-driven. I would suggest testing this stuff out and then asking them for references. As far as Gaja's paper, I have worked with Gaja for at least 6 years and believe his paper to apply quite nicely. It's not the type of disk implemented, its how you implement it. Thank You Stephen P. Karniotis Technical Alliance Manager Compuware Corporation Direct: (248) 865-4350 Mobile: (248) 408-2918 Email: [EMAIL PROTECTED] Web:www.compuware.com -Original Message- Sent: Tuesday, January 15, 2002 11:49 AM To: Multiple recipients of list ORACLE-L Subject:SAME, WAFL and RAID Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID (shake, rattle and roll? - sorry) file systems. We have some systems people pushing a vendor (Procom) and their WAFL filesystem as a platform for an Oracle data warehouse; showing them parts of Gaja's paper Implementing Raid on Oracle Systems resulted in the response of WAFL is different from Raid - this paper doesn't apply. I found a white paper Optimal Storage Configuration Made Easy on Technet, which advocates the SAME methodology, and am wondering about the differences among these configurations. Are WAFL and SAME the same(sic)? Are WAFL and/or SAME just other variants of Raid, or are the differences greater than the similarities? As always, any advice/comments are appreciated. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Orr, Steve INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Bill; We are using the Netapp filler with the WAFL file system and, I must tell you, I like it. It has some very good advantages. The largest, in my mind, is the fact that our downtime to do backups is only about 5 minutes a day. We take the DBs down , make a snapshot, then bring them back up. After that, we make a backup of the snapshot onto tape without interupting production any more. I think its worth file for you to look into them. NetApp has a technical library that might help you get some information on it. You can find it at http://www.netapp.com/tech_library/ Good luck. Kevin -Original Message- Sent: Tuesday, January 15, 2002 10:49 AM To: Multiple recipients of list ORACLE-L Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID (shake, rattle and roll? - sorry) file systems. We have some systems people pushing a vendor (Procom) and their WAFL filesystem as a platform for an Oracle data warehouse; showing them parts of Gaja's paper Implementing Raid on Oracle Systems resulted in the response of WAFL is different from Raid - this paper doesn't apply. I found a white paper Optimal Storage Configuration Made Easy on Technet, which advocates the SAME methodology, and am wondering about the differences among these configurations. Are WAFL and SAME the same(sic)? Are WAFL and/or SAME just other variants of Raid, or are the differences greater than the similarities? As always, any advice/comments are appreciated. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Bill Becker INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Kevin Lange INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Thanks for the correction Steve. Thank You Stephen P. Karniotis Technical Alliance Manager Compuware Corporation Direct: (248) 865-4350 Mobile: (248) 408-2918 Email: [EMAIL PROTECTED] Web:www.compuware.com -Original Message- Sent: Tuesday, January 15, 2002 2:10 PM To: Multiple recipients of list ORACLE-L Subject:RE: SAME, WAFL and RAID WAFL and SAME are not the same. WAFL stands for Write Anywhere File Layout. It is a Network Appliance proprietary system and they've trade marked WAFL. Coincidentally it's a RAID 4 NFS implementation. See: http://www.netapp.com/tech_library/3002.html#I3 Beware the marketing droids... -Original Message- Sent: Tuesday, January 15, 2002 10:40 AM To: Multiple recipients of list ORACLE-L Bill: I believe that WAFL and SAME are variations on the technology implemented for RAID. WAFL and SAME are new technologies adopted by smaller disk manufacturers as a way to complete against the RAID implementers like EMC, Network Appliance, etc. In my humble opinion, I would not bet the house on technology that you have not test-driven. I would suggest testing this stuff out and then asking them for references. As far as Gaja's paper, I have worked with Gaja for at least 6 years and believe his paper to apply quite nicely. It's not the type of disk implemented, its how you implement it. Thank You Stephen P. Karniotis Technical Alliance Manager Compuware Corporation Direct: (248) 865-4350 Mobile: (248) 408-2918 Email: [EMAIL PROTECTED] Web:www.compuware.com -Original Message- Sent: Tuesday, January 15, 2002 11:49 AM To: Multiple recipients of list ORACLE-L Subject:SAME, WAFL and RAID Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID (shake, rattle and roll? - sorry) file systems. We have some systems people pushing a vendor (Procom) and their WAFL filesystem as a platform for an Oracle data warehouse; showing them parts of Gaja's paper Implementing Raid on Oracle Systems resulted in the response of WAFL is different from Raid - this paper doesn't apply. I found a white paper Optimal Storage Configuration Made Easy on Technet, which advocates the SAME methodology, and am wondering about the differences among these configurations. Are WAFL and SAME the same(sic)? Are WAFL and/or SAME just other variants of Raid, or are the differences greater than the similarities? As always, any advice/comments are appreciated. -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Orr, Steve INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Karniotis, Stephen INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Deshpande, Kirti INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
You make WAFL's with a WAFL iron. Ken -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L Subject:Re: SAME, WAFL and RAID May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Ken Janusz INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Absolutely good idea. -Original Message- Sent: Tuesday, January 15, 2002 3:23 PM To: Multiple recipients of list ORACLE-L Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Deshpande, Kirti INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: Kevin Lange INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Title: RE: SAME, WAFL and RAID good question... RAID and WALF -- see below. SAME... no idea... RAID - (from http://www.uni-mainz.de/~neuffer/scsi/what_is_raid.html ) What does RAID stand for ? In 1987, Patterson, Gibson and Katz at the University of California Berkeley, published a paper entitled A Case for Redundant Arrays of Inexpensive Disks (RAID) . This paper described various types of disk arrays, referred to by the acronym RAID. The basic idea of RAID was to combine multiple small, inexpensive disk drives into an array of disk drives which yields performance exceeding that of a Single Large Expensive Drive (SLED). Additionally, this array of drives appears to the computer as a single logical storage unit or drive. The Mean Time Between Failure (MTBF) of the array will be equal to the MTBF of an individual drive, divided by the number of drives in the array. Because of this, the MTBF of an array of drives would be too low for many application requirements. However, disk arrays can be made fault-tolerant by redundantly storing information in various ways. Five types of array architectures, RAID-1 through RAID-5, were defined by the Berkeley paper, each providing disk fault-tolerance and each offering different trade-offs in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID-0 array. WAFL (from the NetApp website) The WAFL (Write Anywhere File Layout) file system and the following features deliver enterprise-class availability: Consistency points. Always a consistent file-system image on disk, even after unplanned shutdowns. Virtually eliminates the need to run time-consuming file-system checks. Snapshot technology. Snapshots are near-instantaneous, transparent, read-only, online copies of the active file systems. Up to 31 Snapshots can be maintained for each data volume. Users can quickly recover deleted or modified files without administrative assistance or restore from tape backup. The Snapshot function requires minimal disk space and causes no disruption of service. Snapshots can be backed up to other media while users are modifying the active file system to minimize business disruption. SnapRestore software. Allows any system to revert back to a specified data volume Snapshot for instant file-system recovery. Terabytes can be recovered in minutes, rather than hours, without going to tape. The software also greatly facilitates scenario testing as well as providing disaster recovery and virus protection. Easy, cost-effective clustering. Safeguards against hardware failures by automatic filer takeover. Gives users continuous access to data. SnapMirror software. Provides remote mirroring at high speeds over a LAN or WAN. The asynchronous mirroring can be used for disaster recovery, replication, backup, or testing on a nonproduction system. -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 1:23 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists 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: Deshpande, Kirti INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists 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
RE: SAME, WAFL and RAID
Title: RE: SAME, WAFL and RAID Great ! Thanks for the info.. - Kirti -Original Message-From: Nick Wagner [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 3:49 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID good question... RAID and WALF -- see below. SAME... no idea... RAID - (from http://www.uni-mainz.de/~neuffer/scsi/what_is_raid.html ) What does RAID stand for ? In 1987, Patterson, Gibson and Katz at the University of California Berkeley, published a paper entitled "A Case for Redundant Arrays of Inexpensive Disks (RAID)" . This paper described various types of disk arrays, referred to by the acronym RAID. The basic idea of RAID was to combine multiple small, inexpensive disk drives into an array of disk drives which yields performance exceeding that of a Single Large Expensive Drive (SLED). Additionally, this array of drives appears to the computer as a single logical storage unit or drive. The Mean Time Between Failure (MTBF) of the array will be equal to the MTBF of an individual drive, divided by the number of drives in the array. Because of this, the MTBF of an array of drives would be too low for many application requirements. However, disk arrays can be made fault-tolerant by redundantly storing information in various ways. Five types of array architectures, RAID-1 through RAID-5, were defined by the Berkeley paper, each providing disk fault-tolerance and each offering different trade-offs in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID-0 array. WAFL (from the NetApp website) The WAFL (Write Anywhere File Layout) file system and the following features deliver enterprise-class availability: Consistency points. Always a consistent file-system image on disk, even after unplanned shutdowns. Virtually eliminates the need to run time-consuming file-system checks. Snapshot technology. Snapshots are near-instantaneous, transparent, read-only, online copies of the active file systems. Up to 31 Snapshots can be maintained for each data volume. Users can quickly recover deleted or modified files without administrative assistance or restore from tape backup. The Snapshot function requires minimal disk space and causes no disruption of service. Snapshots can be backed up to other media while users are modifying the active file system to minimize business disruption. SnapRestore software. Allows any system to revert back to a specified data volume Snapshot for instant file-system recovery. Terabytes can be recovered in minutes, rather than hours, without going to tape. The software also greatly facilitates scenario testing as well as providing disaster recovery and virus protection. Easy, cost-effective clustering. Safeguards against hardware failures by automatic filer takeover. Gives users continuous access to data. SnapMirror software. Provides remote mirroring at high speeds over a LAN or WAN. The asynchronous mirroring can be used for disaster recovery, replication, backup, or testing on a nonproduction system. -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 1:23 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists 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: Deshpande, Kirti INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mai
RE: SAME, WAFL and RAID
Hi, WAFL is Write Anywhere File Layout... Its the file lay out used by snapshot supported storege Devices(NetApp Storege Etc), This is completely different from a RAID. A RAID is a system which may or maynot be h/w controlled. But WAFL is the Low level file layout of the Storege system. In any one wants i hv the paper or Hutchinston with me on WAFL which i can give u Regards OraEtM!! _ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Eswar the MAD INET: [EMAIL PROTECTED] Fat City Network Services-- (858) 538-5051 FAX: (858) 538-5051 San Diego, California-- Public Internet access / Mailing Lists 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: SAME, WAFL and RAID
Title: RE: SAME, WAFL and RAID SAME = 'stripe and mirror everthing' BHT = 'butylated hydroxytoluene' -Original Message-From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 5:29 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID Great ! Thanks for the info.. - Kirti -Original Message-From: Nick Wagner [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 3:49 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID good question... RAID and WALF -- see below. SAME... no idea... RAID - (from http://www.uni-mainz.de/~neuffer/scsi/what_is_raid.html ) What does RAID stand for ? In 1987, Patterson, Gibson and Katz at the University of California Berkeley, published a paper entitled "A Case for Redundant Arrays of Inexpensive Disks (RAID)" . This paper described various types of disk arrays, referred to by the acronym RAID. The basic idea of RAID was to combine multiple small, inexpensive disk drives into an array of disk drives which yields performance exceeding that of a Single Large Expensive Drive (SLED). Additionally, this array of drives appears to the computer as a single logical storage unit or drive. The Mean Time Between Failure (MTBF) of the array will be equal to the MTBF of an individual drive, divided by the number of drives in the array. Because of this, the MTBF of an array of drives would be too low for many application requirements. However, disk arrays can be made fault-tolerant by redundantly storing information in various ways. Five types of array architectures, RAID-1 through RAID-5, were defined by the Berkeley paper, each providing disk fault-tolerance and each offering different trade-offs in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID-0 array. WAFL (from the NetApp website) The WAFL (Write Anywhere File Layout) file system and the following features deliver enterprise-class availability: Consistency points. Always a consistent file-system image on disk, even after unplanned shutdowns. Virtually eliminates the need to run time-consuming file-system checks. Snapshot technology. Snapshots are near-instantaneous, transparent, read-only, online copies of the active file systems. Up to 31 Snapshots can be maintained for each data volume. Users can quickly recover deleted or modified files without administrative assistance or restore from tape backup. The Snapshot function requires minimal disk space and causes no disruption of service. Snapshots can be backed up to other media while users are modifying the active file system to minimize business disruption. SnapRestore software. Allows any system to revert back to a specified data volume Snapshot for instant file-system recovery. Terabytes can be recovered in minutes, rather than hours, without going to tape. The software also greatly facilitates scenario testing as well as providing disaster recovery and virus protection. Easy, cost-effective clustering. Safeguards against hardware failures by automatic filer takeover. Gives users continuous access to data. SnapMirror software. Provides remote mirroring at high speeds over a LAN or WAN. The asynchronous mirroring can be used for disaster recovery, replication, backup, or testing on a nonproduction system. -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 1:23 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL PROTECTED] wrote: Hello, I am looking for any pointers to white papers, etc. that discuss the differences/similarities among WAFL, SAME and RAID __ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists 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, incl
RE: SAME, WAFL and RAID
Title: RE: SAME, WAFL and RAID Yea, they were talking about clustering all right. sure uh huh right Whatever! -Original Message-From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 6:26 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID New one I heard at our local Oracle office : RAIP = Redundant Arrayof Independent Processors (Those guys were talking about NT Clustering... ) -Original Message-From: Mohan, Ross [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 4:41 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID SAME = 'stripe and mirror everthing' BHT = 'butylated hydroxytoluene' -Original Message-From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 5:29 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID Great ! Thanks for the info.. - Kirti -Original Message-From: Nick Wagner [mailto:[EMAIL PROTECTED]]Sent: Tuesday, January 15, 2002 3:49 PMTo: Multiple recipients of list ORACLE-LSubject: RE: SAME, WAFL and RAID good question... RAID and WALF -- see below. SAME... no idea... RAID - (from http://www.uni-mainz.de/~neuffer/scsi/what_is_raid.html ) What does RAID stand for ? In 1987, Patterson, Gibson and Katz at the University of California Berkeley, published a paper entitled "A Case for Redundant Arrays of Inexpensive Disks (RAID)" . This paper described various types of disk arrays, referred to by the acronym RAID. The basic idea of RAID was to combine multiple small, inexpensive disk drives into an array of disk drives which yields performance exceeding that of a Single Large Expensive Drive (SLED). Additionally, this array of drives appears to the computer as a single logical storage unit or drive. The Mean Time Between Failure (MTBF) of the array will be equal to the MTBF of an individual drive, divided by the number of drives in the array. Because of this, the MTBF of an array of drives would be too low for many application requirements. However, disk arrays can be made fault-tolerant by redundantly storing information in various ways. Five types of array architectures, RAID-1 through RAID-5, were defined by the Berkeley paper, each providing disk fault-tolerance and each offering different trade-offs in features and performance. In addition to these five redundant array architectures, it has become popular to refer to a non-redundant array of disk drives as a RAID-0 array. WAFL (from the NetApp website) The WAFL (Write Anywhere File Layout) file system and the following features deliver enterprise-class availability: Consistency points. Always a consistent file-system image on disk, even after unplanned shutdowns. Virtually eliminates the need to run time-consuming file-system checks. Snapshot technology. Snapshots are near-instantaneous, transparent, read-only, online copies of the active file systems. Up to 31 Snapshots can be maintained for each data volume. Users can quickly recover deleted or modified files without administrative assistance or restore from tape backup. The Snapshot function requires minimal disk space and causes no disruption of service. Snapshots can be backed up to other media while users are modifying the active file system to minimize business disruption. SnapRestore software. Allows any system to revert back to a specified data volume Snapshot for instant file-system recovery. Terabytes can be recovered in minutes, rather than hours, without going to tape. The software also greatly facilitates scenario testing as well as providing disaster recovery and virus protection. Easy, cost-effective clustering. Safeguards against hardware failures by automatic filer takeover. Gives users continuous access to data. SnapMirror software. Provides remote mirroring at high speeds over a LAN or WAN. The asynchronous mirroring can be used for disaster recovery, replication, backup, or testing on a nonproduction system. -Original Message- From: Deshpande, Kirti [mailto:[EMAIL PROTECTED]] Sent: Tuesday, January 15, 2002 1:23 PM To: Multiple recipients of list ORACLE-L Subject: RE: SAME, WAFL and RAID Good idea.. All I know about WAFL is the House where breakfast is served ;) - Kirti -Original Message- Sent: Tuesday, January 15, 2002 2:57 PM To: Multiple recipients of list ORACLE-L May I make a suggestion? It would be helpful if posters would expand acronyms the first time they use them. I, at least, have no idea what WAFL is. Thanks. --- Bill Becker [EMAIL
