Re: [Veritas-bu] Spam: NBU 6 Tuning for Small Files Backup
2007-06-13 03:45:09
The file sizes are 1KB to 4MB and are in hundreds of thousands totaling to ~400GB most of the time.
On 6/13/07, WEAVER, Simon (external) <
simon.weaver AT astrium.eads DOT net> wrote:
what sort of files are they? We have a SAN Media
Server, via fibre, with NBU 5.1 via LTO3 Tapes and get good
throughput.
Its a Windows box though! But does the job - used to take 42
hours, but now down to 16 hours - approx 4TB - huge mix and match of file sizes.
from 2kb to 1mb !
No tuning was done, no flashback was
implemented.
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
Khurram,
Flashbackup will improve the performance (it caches the
data as a sort of snapshot then backs-up the snapshot so it's like a large
file rather than loads of small ones, or something like that....) but because
it works per volume, you need the space for the cache, which is at least the
same size as the volume you are backing-up.
It will improve performance for loads of small files
but probably won't help too much if they are on a huge volume and they
take up a small % of the space.
Cheers,
Tim
Hi All,
We have just migrated to a NBU 6 SAN based
environment. We have a server with a large number of small files (100k to 4MB)
and its performing quite poorly on SAN based backup (5MB per stream). Can
anyone advise some tuning parameters to improve this speed? The library
is L500 with FC LTO3 drives.
Regards, Khurram
IMPORTANT: This email remains the property
of the Australian Defence Organisation and is subject to the jurisdiction of
section 70 of the CRIMES ACT 1914. If you have received this email in error,
you are requested to contact the sender and delete the email.
This email (including any attachments) may contain confidential and/or privileged information or information otherwise protected from disclosure. If you are not the intended recipient, please notify the sender immediately, do not copy this message or any attachments and do not use it for any purpose or disclose its content to any person, but delete this message and any attachments from your system. Astrium disclaims any and all liability if this email transmission was virus corrupted, altered or falsified.
---------------------------------------------------------------------
Astrium Limited, Registered in England and Wales No. 2449259
Registered Office: Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2AS, England
|
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
|
|
|