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: <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Wilkinson,
Tim
Sent: 13 June 2007 05:38
To: Khurram Tariq; veritas-bu@mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Spam: NBU 6 Tuning for Small Files Backup
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
_____
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Khurram
Tariq
Sent: Tuesday, 12 June 2007 6:07 PM
To: veritas-bu@mailman.eng.auburn.edu
Subject: Spam: [Veritas-bu] NBU 6 Tuning for Small Files Backup
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
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