Dave,
A really interesting question this is. I can't answer it.
But, I would ask you this: if the spooling time elapsed is near to the
despool time, then why spool at all?
Our setup was set up originally with all jobs spooled (and we have the same
Quantum Superloader/Drive that you do); I realized after 8 months that some
of the jobs were able to acquire data quickly enough that they did not need
to use spooling at all - and for those jobs, we dropped the backup time by
over 50%.
_KMP
On Tue, May 12, 2009 at 10:20, Mattinson David <dpmattin...@qinetiq.com>wrote:
> Hi
>
> I have installed Bacula-3.0.1 (gcc 3.4.3) on a Solaris 10 10/08 Sun
> T5420 server with a Quantum Superloader DLT-S4 attached. postgreSQL
> database.
>
> I use a spool area of 5GB and the backup always progresses to normal
> completion & no btape issues.
>
> The normal sequence of events for a local 360GB data set involves
> repeating
>
> Spooling 5GB data 4-5 mins
> Despooling 5GB data 5-7 mins
>
> The period between the spooling ending message and spooling again varies
> from next to nothing, which I would expect, and 33 minutes. That is the
> difference between
>
> 08-May 22:48 server-sd JobId 4044: Despooling elapsed time = 00:05:23,
> Transfer rate = 16.23 M bytes/second
>
> and
>
> 08-May 23:14 server-sd JobId 4044: Spooling data again ...
>
> This is run when the server is otherwise quiet, but results in a backup
> that I would expect to take less than 4 hours is close to 18, which
> means I can't run it during the week.
>
> Is there anything obvious I'm missing?
>
> Dave
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