Bacula-users

Re: [Bacula-users] Short (minimiscule) spool files -> poo performance

2008-06-11 06:57:58
Subject: Re: [Bacula-users] Short (minimiscule) spool files -> poo performance
From: Frank Sweetser <fs AT WPI DOT EDU>
To: Terry Collins <terryc AT woa.com DOT au>
Date: Wed, 11 Jun 2008 06:57:21 -0400
Terry Collins wrote:
> As I understand it,the idea behind a spool file is to buffer the tape 
> device,so that the tape drive is kept in streaming mode as much as possible.
> 
> HJowever, my installation has this habit of deciding to buffer in 1.2Mb 
> chuncks, for a 44Gb backup,
> 
> This is a bit from the report
> .................................................
> Looking for ideas to overcome the problemThis is a shot fr
> 
> 11-Jun 12:03 bluewren-dir: Start Backup JobId 1063, 
> Job=HarrierFull.2008-06-11_11.30.00
> 11-Jun 12:03 bluewren-sd: Spooling data ...
> 11-Jun 12:03 bluewren-sd: User specified spool size reached.
> 11-Jun 12:03 bluewren-sd: Writing spooled data to Volume. Despooling 
> 1,290,480 bytes ...

When I've seen this problem, it was because the total amount of data contained
in the spool directory really was only a few megs below the limit.  Typically
it was either due to other concurrent jobs, in which case I avoided the
problem by upping the spool size, or leftover spool files from crashed jobs,
which can be safely deleted.

-- 
Frank Sweetser fs at wpi.edu  |  For every problem, there is a solution that
WPI Senior Network Engineer   |  is simple, elegant, and wrong. - HL Mencken
    GPG fingerprint = 6174 1257 129E 0D21 D8D4  E8A3 8E39 29E3 E2E8 8CEC

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