RE: Rman Full Backup with DataDomain
- From: Martin Brown <martinfbrown@xxxxxxxxxxx>
- To: <rui.amaral@xxxxxxxxxxxxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Mon, 25 Oct 2010 10:48:18 -0400
mounted as so:
xx.xx.xx.x:/backup /mnt/dd510 nfs
nolock,hard,intr,nfsvers=3,tcp,rsize=32768,wsize=32768,bg 0 0
This was set up as per the DataDomain best practices also.
From: Rui.Amaral@xxxxxxxxxxxxxxxx
To: martinfbrown@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx
Date: Mon, 25 Oct 2010 10:10:45 -0400
Subject: RE: Rman Full Backup with DataDomain
Hi Martin,
what's you nfs mount options? I had something similar and it was tied to that.
Rui Amaral
Database Administrator
ITS - SSG
TD Bank Financial Group
220 Bay St., 11th Floor
Toronto, ON, CA, M5K1A2
(bb) (647) 204-9106
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Martin Brown
Sent: Monday, October 25, 2010 10:03 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Rman Full Backup with DataDomain
I have an interesting problem. I am running full backup cycles of the database
twice a week and we have re-directed the backuppieces to a DataDomain device.
THe problem is the performance has tanked. Normal backups to a NAS take
approximately 5 hours. The *new and improved* DataDomain option takes just
under 16 hours.
I have modified the rman script to conform to DataDomain's Best Practice docs
(i.e...filesperset=1, uncompressed, yada...yada...) but I still am unable to
achieve acceptable performance.
The database configuration follows Oracle's MAA whitepaper on High
Availability. I use a local standby to run the full backup to offload the CPU
and memory burden from the production environment. I run semi-annual tests on
the backups to verify they are indeed good and I've never hade any issues. We
run nightly incrementals on the primary using block change tracking and image
copies of the datafiles. Again, never have had any issues.
Can anyone offer any suggestions?
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