Hi,

I use backup to disk to backup my clients and I hit the slow restore 
problem when backup jobs run concurrently and use the same storage 
device/volume. The backup window is small and therefore jobs must run at 
the same time.

My first intention was to create for each client a dedicated storage 
device, similar like [1]. With this configuration each backup job is saved 
on a sperated volume, no mixups and slow restore is gone. But the 
configuration overhead is huge and for a new client I have to restart the 
storage daemon.

During my web search I found the configuration of mashdot [2]. He use four 
generic storage devices and use _all_ four in the Job Resource 
configuration.

Job {
...
   Storage = 
PrimaryFileStorage,SecondaryFileStorage,TertiaryFileStorage,QuaternaryFileStorage
...
}

It's possible to define more than one storage device and the jobs will 
select automatically the next free one until all are in used? I couldn't 
find anything about this in the official documentation or in mailing list 
archives.

If this is possible, why I'm getting the following errors when a jobs 
starts during another is already running?

26-Jul 16:48 bacula.example.com-dir JobId 889: Start Backup JobId 889, 
Job=client2.example.com.2012-07-26_16.48.08_54
26-Jul 16:48 bacula.example.com-dir JobId 889: Created new Volume 
"client2.example.com-fd-new_FullPool-20120726-1648-889" in catalog.
26-Jul 16:48 bacula.example.com-dir JobId 889: Error: sql_create.c:424 Volume 
"client2.example.com-fd-new_FullPool-20120726-1648-889" already exists. 
26-Jul 16:48 bacula.example.com-dir JobId 889: Error: sql_create.c:424 Volume 
"client2.example.com-fd-new_FullPool-20120726-1648-889" already exists.
26-Jul 16:48 bacula.example.com-dir JobId 889: Error: sql_create.c:424 Volume 
"client2.example.com-fd-new_FullPool-20120726-1648-889" already exists.


Thanks,

  - Jummo



[1] http://myunix.dk/category/bacula/
[2] https://gist.github.com/2312522

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