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19 Mar 2015
Backup

Has anyone experienced a 30% slowdown in backups after upgrading from v12 to v14.10?
If so, how did you tune it to perform better?

teradatauser2 236 posts Joined 04/12
22 Mar 2015

Hi ,
We had the same issue in our installation. But, we knew the reason for it. When the TD14 was upgraded, the BAR was still not upgraded and it was using a public network, so the speed was slow. After that TD GSC upgraded the BAR and moved it closer to the TD box and started using provate network, then our backups were fast, in fact faster than TD13.10. Pls check if that is a reason for you also.
--Samir

risberg 1 post Joined 03/15
31 Mar 2015

Hello,
Perhaps it's related to NTA 3513?
KB article KAP1140EA2
 

seven11 26 posts Joined 12/09
23 Apr 2015

'llo,
Assuming this is not the SLES 11 kernel issue noted, the backup design hasn't been altered, and the system performance/resource availability is the same.
Also assuming we are talking about an ARC based backup solution
One thing with major upgrades is the Workload Management rules get reset on the backup account sessions back down to the default of 4 sessions, you can normally tell by looking at an ARC log near the begining

ARC HAS REQUESTED 25 SESSIONS, TASM HAS GRANTED IT 4 SESSIONS

Session count per stream should have been calculated for balanced backups (if possible) factoring in node type(s), AMP count per node, and backup strategy & infrastructure.
 
ta'

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