Interesting. We have had similar issues with NBU DSSUs.
The HPSS (www.hpss-collaboration.org/hpss) seems to be the best option,
combined with ACSLS, for our environment.
We have HPSS running with other equipment in one of our scientific
divisions (www.nersc.gov) and they just rave about its abilities.
I note it supports (server,disk and offline storage on the server-side)
Solaris and AIX. But the client-side support is there for many, many
other platforms, from Cray T3 UNICOS to Linux, where there are a variety
of tools to use (such as htar and other HSI unix-like tools).
We are thinking about a hybrid NBU/HPSS approach, allowing data to be
staged in various areas of storage, based on user-customizable rules.
Backups would be on top of the ACSLS and HPSS.
Just my $.02.
Certainly not the cheapest solution, but it does give more manageability
to at least larger SAN environments like ours.
hth
Cheers!
--Chris
Ambrose, Monte wrote:
DSSU sizing is really important. If the Disk runs out then you start
getting status 84's and jobs fail. This seems reasonable except that
NBU does not free up the space for the failed jobs until the jobs are
restarted. If the job is a large one then you could get several more
backup failures from other jobs before the job retries and cleans up the
old space from the failed backup.
The cleanup process for disk images already copied to tape is not very
efficient. I also have had to create a script that checks for disk
backup images that are successfully copied to tape so that I can clean
up the images to make room for the new backups coming in. The script
also checks for high and low watermarks and emails/pages if the disk
space gets lower than 90%
I also agree that you want to use fast disk for this. We have tested
with a few different levels and are now using SAN attached RAID10
I am at NBU 5.1MP4. I am looking at moving to NBU 6.0 MP2 to take
advantage of all the new DSSU improvements and features.
Monte
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Johnny
Oestergaard
Sent: Thursday, April 27, 2006 10:44 AM
To: 'Steven L. Sesar'; 'NetBackup Veritas'
Subject: RE: [Veritas-bu] DSSU/DSU experience
I have been using DSSU since 5.1 came out.
But I have primarily used it for very slow clients so that I didn't
block my
tapedrives with these backups.
It has been working really fine, except the lack of configuration and
performance/tuning. And it has been really easy to use.
I have upgraded to 6.0 MP2 now, and there are a lot of nice new stuff in
6.0
regarding DSSU, but I haven't had that much time to check it out. But it
seems to perform better and there are also more configuration options.
Not
that I couldn't make a 1 meter list of things I would like to have.
DSU's I have only used for testing, so no comments from me on that. But
when
I looked at it DSSU seemed to me to be a much better solution. At least
in
our installation.
Have never used VTL, so also no comments on that.
/johnny
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Steven L.
Sesar
Sent: 27. april 2006 19:09
To: NetBackup Veritas
Subject: [Veritas-bu] DSSU/DSU experience
We're in the process of rearchitecting our BUR infrastructure. The most
profound change will be the addition of disk storage, as we are 100%
tape, right now. We're considering a few different disk technologies,
such as VTL, DataDomain NAS heads, as well as traditional DSU/DSSUs.
I've heard anecdotal evidence that DSU/DSSU functionality in NBU 5.1 is
less-than-stellar. Would anyone care to share their overall experience
with disk storage?
Thanks,
Steve
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_______________________________________________
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