The other question is is bacula waiting on the DB or has that been
spooled (I would check the DB as the backup is running to see how that's
doing).
-Jason
On Thu, 2008-07-10 at 21:55 +0100, Martin Simmons wrote:
> >>>>> On Thu, 10 Jul 2008 13:10:31 +0200 (CEST), Jesper Krogh said:
> >
> > Hi.
> >
> > I've just hardware upgraded my bacula-server to a machine with 48GB ram.
> > I've allocated at most 35GB to a "tmpfs" as spooling
> > tmpfs /z/bacula-spool tmpfs size=35g 0 0
> >
> > And performance seems to be excellent on this filesystem (2 x LTO3
> > attached):
> > jk@bacula:/z/bacula-spool$ sudo dd
> > if=bacula-sd.data.16716.Hal_Daily.2008-07-09_23.58.15.LTO3-0.spool
> > bs=64512 of=/dev/null
> > 124007+1 records in
> > 124007+1 records out
> > 7999943571 bytes (8,0 GB) copied, 4,93783 s, 1,6 GB/s
> >
> > But my backup de-spooling speed sucks (at best):
> > 10-Jul 11:31 bacula-sd JobId 16716: Despooling elapsed time = 03:06:23,
> > Transfer rate = 715.3 K bytes/second
> > 10-Jul 11:31 bacula-sd JobId 16716: Spooling data again ...
> > 10-Jul 11:34 bacula-sd JobId 16716: User specified spool size reached.
> > 10-Jul 11:34 bacula-sd JobId 16716: Writing spooled data to Volume.
> > Despooling 8,000,008,095 bytes ...
> >
> > Note . .. in the first 4-5 incremental jobs I actually go ~80MB/s on it, so
> > it has just degradede over night.
> >
> > Any suggestions?
>
> Is the drive shoe-shining?
>
> What does iostat show about the devices during despooling?
>
> Have you tested the performance of tar writing to a tape from the tmpfs?
>
> __Martin
>
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Jason A. Kates (jason AT kates DOT org)
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