On 14-10-30 06:27 AM, Jeff MacDonald wrote:
> Hi,
>
> I have some backups going at 2MB/s which for a 380gig backup is just too 
> slow. I’m trying to find my bottleneck.
>
> Some questions:
>
> - Is the rate of the backup only shown in “messages” or is it stored in the 
> db anywhere. Or could I just do jobbytes / endtime-starttime in the jobs 
> table?
>
> - Does bacula write data to disk via a stream or lots of little latency 
> dependant writes?
>
> My environment looks like this
>
> - Bacula (and postgres on the same VM), a MS Small business server and 3 or 4 
> other VMs run on a 6 disk array of 7200rpm SATA disks ( I bet this is already 
> my slowpoint )
> - Bacula stores its backups on a NFS mounted NAS, about .7ms of ping away.
>
> Tips/Suggestions?
>
> Jeff.
>
What is the content of your backups?  Some things (ie thousands of tiny 
files) will cause a lot of seeks on the machine to be backed up.  If you 
aren't using attribute spooling then each backed up file also causes a 
record to be inserted in to the database, which may take time depending 
on your DB environment.

The 'suggestions' for tuning will be different if you are backing up a 
few dozen 10GB files versus backing up a million 10kb files.

Bryn

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