Re: [Veritas-bu] Enterprise Vault backup - increase throughput ....
2007-07-12 12:26:38
Cameron.
Here’s a relatively new doc from KVS about backing up closed
partitions …
http://seer.support.veritas.com/docs/285006.htm
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: Wednesday, July 11, 2007 1:45 PM
To: WEAVER, Simon (external); veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] Enterprise Vault backup - increase throughput
....
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
....
I am in a similar boat, and although the backups go on for a while,
I am going to implement a SAN Media Server to help with this.
As a rule I turn off any AV, disk i/O software on this box during
the backup and ensure tracker.exe is not tunning.
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 ....
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.
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