RE: RMAN backup - basic Qs

2003-01-17 Thread Mercadante, Thomas F
I stand corrected. thanks Robert. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, January 16, 2003 3:20 PM To: Multiple recipients of list ORACLE-L RMAN does no compression on any blocks with data. The only compression that occurs that blocks above the

RE: RMAN backup - basic Qs

2003-01-17 Thread Deshpande, Kirti
Also, RMAN can do incremental backups, copying only the blocks that changed since last backup. More about all this in Oracle Manuals and in Robert's book. - Kirti -Original Message- Sent: Thursday, January 16, 2003 10:04 PM To: Multiple recipients of list ORACLE-L Maria -

RE: RMAN backup - basic Qs

2003-01-16 Thread Mercadante, Thomas F
No. Because Rman is not placing the tablespaces in a HOT BACKUP mode. Rman is simply reading the blocks, compressing them, and writing them to tape. Tom Mercadante Oracle Certified Professional -Original Message- Sent: Thursday, January 16, 2003 12:35 PM To: Multiple recipients of

Re: RMAN backup - basic Qs

2003-01-16 Thread Ruth Gramolini
Rman uses the same construct to get the right data in a hot backup as sqlplus, the SCN of the database. It reduces excess redo because you don't have to put the datafile in backup mode with a begin backup and take it out with and end backup. HTH, Ruth - Original Message - To: Multiple

RE: RMAN backup - basic Qs

2003-01-16 Thread Freeman Robert - IL
RMAN does no compression on any blocks with data. The only compression that occurs that blocks above the HWM are not included. No compression of data occurs, and in fact empty blocks can and are backed up by RMAN. RF Robert G. Freeman Technical Management Consultant TUSC - The Oracle Experts

RE: RMAN backup - basic Qs

2003-01-16 Thread Chris Stephens
Title: RE: RMAN backup - basic Qs what happens when a 'snapshot too old' situation occurs??...how can RMAN produce a valid backup in that case? many i'm missing something. -Original Message- From: Ruth Gramolini [mailto:[EMAIL PROTECTED]] Sent: Thursday, January 16, 2003 1:54 PM

RE: RMAN backup - basic Qs

2003-01-16 Thread Jared . Still
of list ORACLE-L [EMAIL PROTECTED] cc: Subject:RE: RMAN backup - basic Qs what happens when a 'snapshot too old' situation occurs??...how can RMAN produce a valid backup in that case? many i'm missing something. -Original Message- Sent: Thursday, January 16, 2003

RE: RMAN backup - basic Qs

2003-01-16 Thread Rajesh . Rao
To better answer the original question, my understanding of this difference is as under: Why do you put the tablespace in backup mode during normal hot backups without RMAN? This is to avoid backing up split blocks. Say, you have a database with a block size of 16K. And that a block is in the

Re: RMAN backup - basic Qs

2003-01-16 Thread Maria Aurora VT de la Vega
does this make RMAN hot backups faster or slower than when backing up file in backup mode? [EMAIL PROTECTED] wrote: To better answer the original question, my understanding of this difference is as under: Why do you put the tablespace in backup mode during normal hot backups without RMAN?

RE: RMAN backup - basic Qs

2003-01-16 Thread DENNIS WILLIAMS
Maria - Definitely faster. Often hot backups can generate additional redo. Dennis Williams DBA, 40%OCP Lifetouch, Inc. [EMAIL PROTECTED] -Original Message- Sent: Thursday, January 16, 2003 9:24 PM To: Multiple recipients of list ORACLE-L does this make RMAN hot backups faster or