Re: [Veritas-bu] Enterprise Vault backup - increase throughput ....
2007-07-12 12:33:26
thanks Philip for being the bearer of bad news! -
just kidding.
Seriously though thanks for sending this over. I know
points 1&2&4 don't apply to our environment, but I will have to
check up on 3.
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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