Re: [Bacula-devel] [Featue request] Multiple concurrent jobs from one fileset and job definition

[Ove R. <Ove...@oc...>]

Hi,

I have a Sun Fire V210 server with fcal disks and I can not get more
than 6MB/s from the root filesystem.

On a filesystem with larger files I have seen transferrates of about
15MB/s when using netbackup and multiple filesystems backupped at the
same time. Netbackup does not get any higher transferrate for the root
filesystem than bacula so I think the bacula filedaemon is quite good.

I have gigabit ethernet and a LTO-3 drive on the bacula system and
gigabit ethernet and multiple SDLT dives on the netbackup system so I do
not think the problem is on the backup server side.

If I backup filesystems located on diferent disks with the netbackup
solution at the same time I get a much higher total transferrate.

/Ove

On Fri, 2005-11-25 at 20:45, Phil Stracchino wrote:
> Ove Risberg wrote:
> >   What:   I want to start multiple backup jobs on one client to get the
> >           fastest possible backup of my server but I do not want a
> >           complicated configuration or restore process.
> 
> >   Why:    Multiple concurrent backups of a large fileserver with many
> >           disks and controllers will be much faster.
> 
> I question this assumption.  My experience is that the disk subsystem of
> any fast client is VERY rarely the performance bottleneck in Bacula.  I
> doubt this will yield a performance increase unless your large server
> also has a very fast network connection AND is being backed up to
> multiple storage devices in parallel.  So unless you have multiple
> servers doing concurrent backups of different filesystems on the same
> client, I doubt you'll gain much.
>