[Veritas-bu] Backup Speeds
2006-10-23 09:20:22
Subject: |
[Veritas-bu] Backup Speeds |
From: |
robq at bluecrestcapital.com (Rob Quagliozzi) |
Date: |
Mon, 23 Oct 2006 14:20:22 +0100 |
Hi all,
I have a Win2k3SP1 file server cluster member that will not back up at
any reasonable kind of speed - it will sometimes kick off at about
12MB/s and can drop as low as 3MB/s (avg is about 5MB/s). It backs up
over Gbit Ethernet, and so I would expect to be seeing somewhat faster
speeds - I have another server that does not drop below 16MB/s.
The policy is split into 3 streams, with multiplex set at 2 (when I set
it to 3 I have Paged Pool errors on the client followed by an OS hang.
(Rectified as of today with a reg key). Occasionally one of the streams
when it kicks off will sit around about 700K/s (always the same
drive/folders as well) and still be running first thing in the
morning... I've even shuffled the jobs around so that this job is the
only one running for a couple of hours.
I've checked all the usual stuff - link speed/duplex (manually set at
1000/Full), virus scan (disabled), windows Open File backups have been
disabled for this client as well, as I was having the odd snapshot
error.
Master server is Win2k3SP1 5.0MP3 with all clients at same level. 2xLTO2
drives in a STK500SL library.
Any ideas? I'm stumped - just to add further confusion, both cluster
nodes exhibit the problem to a degree. Argh!
Thanks
Rob Q
Rob Quagliozzi
Senior Systems Administrator
BlueCrest Capital Management
40 Grosvenor Place
London SW1X 7AW
Tel: 020 7664 3545
robq at bluecrestcapital.com
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