If you are using a single tape drive, you will have an issue.
One thing you could theoretically do is configure the storage daemon,
storage resource, job, and pool all for multiple concurrent jobs. The
bacula manual explains how to do that. But I'm not sure if that really
gives you the results you would want, and it can potentially be a problem.
A couple other thoughts:
- I actually shut down the monitoring system during backup runs for
exactly that type of reason. I know and expect that some services will
be slower than normal, no need to be alerted about it. I am using
Nagios, and simply configured a script to create a scheduled downtime
when the nightly backup starts. I don't know if that is acceptable for
your situation, of course.
- You could use spooling for the transaction logs, since you say that
you have local file storage available. That way, the client would see
the backup completed quickly, and bacula would later write the actual
files to tape at its convenience.
- Maybe I'm showing my ignorance on databases here, but does it even
make sense to flush transaction logs to tape while the database itself
is being backed up? Maybe you can suspend flushing the logs during the
backup? My admittedly very rusty SQL Server skills seem to recall that
the transaction log will be cleaned up during the database backup. Not
sure if that still applies, or if it translates to other databases.
Jason Dixon wrote:
> Rather than continue to beat my head against the wall, let me describe
> what I need Bacula to perform and hopefully someone smarter than me can
> suggest the best setup.
>
> We have 3 types of jobs in this particular facility:
>
> 1) OS backups that run nightly
> 2) Database backup that runs nightly
> 3) Database transaction logs that are initiated by the client, typically
> every 10 minutes. These are very important and need to be flushed to
> tape in an expedient manner.
>
> We have a single drive Sony SDX-700C robot. We also have local file
> storage available. The most important consideration is that #3 gets
> completed quickly each time it runs, or it risks backing up the next run
> and causing our monitoring system to page. :-P
>
> The problem I typically run into is that because the client initiates
> the #3 jobs, they are forced to wait each night as #1 jobs finish. Even
> with a higher priority, since they are not scheduled jobs. I even went
> so far as to create a FileStorage device for #1 jobs. But this made no
> difference in my tests.
>
> My last resort is to start up another storage daemon for the #1 jobs, but
> I'd like to ask you all first to see if there's a better way, or maybe
> I've just missed something simple.
>
> Thanks,
>
>
--
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Owner
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