Bacula-users

Re: [Bacula-users] Performance problems in migration from disk to tape

2009-01-23 03:48:15
Subject: Re: [Bacula-users] Performance problems in migration from disk to tape
From: Pasi Kärkkäinen <pasik AT iki DOT fi>
To: Ari Suutari <Ari.Suutari AT syncrontech DOT com>
Date: Fri, 23 Jan 2009 10:46:20 +0200
On Fri, Jan 23, 2009 at 10:05:53AM +0200, Ari Suutari wrote:
> Hi,
> 
> My configuration is roughly like this: I back up
> about 10 hosts to disk volume using bacula and
> migrate the backups to tape once a week.
> 
> Backups work ok, the resulting volume file on
> disk is currently about 25 Gb. I have also some
> backups going directly to tape, performance there
> is also ok.
> 
> But the weekly migration job, which moves backups
> from disk volume to tape is really slow.
> 
> For example:
>   Elapsed time:           7 mins 14 secs
>   SD Files Written:       2
>   SD Bytes Written:       3,913,732 (3.913 MB)
> 
> A relatively small backup job, only a couple of
> megabytes took more than 7 minutes. When I looked
> at the machine, it was doing heavy disk io, tape
> is mostly idle.
> 
> This sounds a little bit similar as issue discussed
> here earlier:
> http://www.mail-archive.com/bacula-users AT lists.sourceforge DOT 
> net/msg31142.html
> 
> I wonder if there was any solution, configuring things
> differently maybe ?
> 

What version of Bacula are you running? Which OS? What kind of hardware do
you have? :)

-- Pasi


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