Cameron.

 

Here’s a relatively new doc from KVS about backing up closed partitions …

 

http://seer.support.veritas.com/docs/285006.htm

 

 

 

 

OK, seems we have come to a solution that I thought I would share.

 

According to our Messaging admin, there are several EV partitions that he has "closed", which is to say will no longer be accepting new writes and only reads. So I am effectvley backing up the same unchanged data over and over.

Thus, I have been able to exclude about 5 partitions from that server and simply bpexpdate the tapes with the last full backup of those partitions for 7 years (our retention). This means I am backing up only changing partitions, hence smaller amounts of data and henceshould bring our backup window to within a 20hr period.

 

From: WEAVER, Simon (external) [mailto:simon.weaver AT astrium.eads DOT net]
Sent: Wednesday, July 11, 2007 2:07 AM
To: Kennedy, Cameron; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Enterprise Vault backup - increase throughput ....

Regards

Simon Weaver
3rd Line Technical Support
Windows Domain Administrator

EADS Astrium Limited, B23AA IM (DCS)
Anchorage Road, Portsmouth, PO3 5PU

Email: Simon.Weaver AT Astrium.eads DOT net

-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Kennedy, Cameron
Sent: Tuesday, July 10, 2007 1:27 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Enterprise Vault backup - increase throughput ....

Hi,

Anyone have some experiences to share about getting maximum throughput from their EV backups?

 

We have Netbackup 5.3mp4 running on AIX with 1 AIX media server,

We have Enterprise Vault (Windows 2003 NTFS) with a GB backup LAN.

I am struggling to get greater than 2500KB/sec backup speed from our vault stores partition.

I know that the greatest issue is that this partition has many tiny files and that this adds overhead in backing up them up.

 

Example: We have right now 606GB consisting of ~983000 files on this partition alone.

 

I get a throughput of ~2500KB/s according to the Netbackup console but I would say it is a little lower based on my math.

I have turned off VSP caching, which did help by ~1500KB/s.

We have turned on the EV collector which should go about collecting the small files into larger CAB files, however, I am still seeing long delays in the time it takes for backups.

During testing, I have found that I can kick off a new stream and backup another partition on the same server and get a throughput of 10,000KB/s which leads me to believe it is not a network related setup issue.

 

Is there anything else that someone has done to increase throughput, or can anyone share what type of performance they are getting?

I am considering a flashcopy scenario of the SAN disk associated with this server which won't fix the issue, but atleast move it from the production server to an offline situation.

I am also considering, doing a raw partition backup (haven't used this method before but read about it in the admin guide), knowing that only a restore of the entire partition would be an option in a DR situation.

 

thanks for any advice.

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