Re: Differential incremental backups

Hi.

I believe that since 10g there are only 3 backup levels.

Level 0: Full backup.
Level 1: Modifications since last backup (any level: 0 1 and 1c).
Level 1c (cumulative): Modifications since last incremental 0 backup.




El 18/03/2010 16:04, andrey khudyakov escribió:
Alan, you can find some information in 9i documentation

"Each incremental level is denoted by an integer, for example, 0, 1, 2, and so forth."

In subsequent release, this phrase was changed. But if you spend a test case (as I did), then all will be clear.

$ rman target /

Recovery Manager: Release 11.2.0.1.0 - Production on Thu Mar 18 17:02:37 2010

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

connected to target database: RACGRID (DBID=386861224)

RMAN>  backup incremental level 5 datafile 4;

Starting backup at 18-MAR-10
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
using channel ORA_DISK_4
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 03/18/2010 17:03:05
RMAN-06011: invalid level specified: 5

RMAN> backup incremental level 4 datafile 4;

Starting backup at 18-MAR-10
using channel ORA_DISK_1
using channel ORA_DISK_2
using channel ORA_DISK_3
using channel ORA_DISK_4
channel ORA_DISK_1: starting incremental level 4 datafile backup set
channel ORA_DISK_1: specifying datafile(s) in backup set
input datafile file number=00004 name=+DATA/racgrid/datafile/users.259.696610733
channel ORA_DISK_1: starting piece 1 at 18-MAR-10

user interrupt received
Finished backup at 18-MAR-10
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03099: job cancelled at user request


By following the following link, I showed that the level of incremental backup does matter, and not used for backward compatibility

2010/3/18 Guillermo Alan Bort <cicciuxdba@xxxxxxxxx>
Andrey,

  can you point to any documentation regarding levels 3 and 4? I can't seem to find any, and can't fathom what they are for.

cheers.
Alan.-



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