Thanks for the responses. I'm going to implement a cron job tonight to query
the sessions every few minutes to see exactly what the session in question
is doing during the "inactive" time.
Journaling (as suggested in another message) is currently being tested for
some on one of our servers. We had problems with it in the past but are
hoping it's improved to the point where it's usable to us.
Regarding fragmentation, I hadn't realized that could be related to this
behavior, but it does make sense. In fact, we know we're horribly fragmented
but are unable to take the necessary downtime to unload/reload the database
in the foreseeable future.
Thanks!
--Matt
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Andy Carlson
Sent: Wednesday, June 09, 2004 2:47 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Long pause in the middle of an NT backup.
One thing that appens during that time is that the TSM server is downloading
directory entries to the client, to sort through and decide what to back up.
With millions of entries (which it appears you have), it can take awhile.
We had a situation with a terribly fragmented DB, where this pause was
lasting 10-15 hours on some boxes. We did an unload/load, and they have all
but one gone back to "normal" (the one that didn't has 5.5Million entries,
and does not have enough memory on the client box).
On Tue, 8 Jun 2004, Anderson, Matt wrote:
> I'm experiencing behavior on some NT nodes where, in the middle of a
> scheduled backup, there will be a long pause where no activity seems
> to occur. It would appear to occur after the backup of one drive
> finishes, but before the next one starts. For example, see this log
> excerpt from this
> morning:
>
> 06/08/2004 01:30:46 ANS1898I ***** Processed 1,911,000 files *****
> 06/08/2004 01:30:47 ANS1898I ***** Processed 1,916,000 files *****
> 06/08/2004 01:30:49 ANS1898I ***** Processed 1,916,500 files *****
> 06/08/2004 01:31:50 Normal File--> 141,971,832
> \\my-server\f$\PerforceETC\Logs\Log.txt Changed
> 06/08/2004 01:32:34 Retry # 1 Normal File--> 141,971,832
> \\my-server\f$\PerforceETC\Logs\Log.txt [Sent]
> 06/08/2004 01:32:34 Successful incremental backup of '\\my-server\f$'
>
> 06/08/2004 07:56:10 ANS1898I ***** Processed 1,917,000 files *****
> 06/08/2004 07:56:13 ANS1898I ***** Processed 1,917,500 files *****
> 06/08/2004 07:56:15 ANS1898I ***** Processed 1,918,000 files *****
> 06/08/2004 07:56:17 ANS1898I ***** Processed 1,918,500 files *****
>
> There's almost 6.5 hours where no activity was logged in the
> dsmsched.log. There is a (possibly) corresponding message in the
> dsmerror.log:
>
> 06/08/2004 01:30:48 win32NpWrite(): Error 233 writing to named pipe
>
> The client is Windows 2000 running TSM client version 5.2.2.5 The TSM
> server is AIX 5.2 running TSM server version 5.2.2.2
>
> Any insight that can be provided would be appreciated!
>
> Thanks,
>
> Matt Anderson
> Backup & Recovery Engineer
>
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