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
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 -
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
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
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
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
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
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
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?
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
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