Bacula-users

[Bacula-users] Concurrent despooling Data with Concurrent Jobs

2012-08-09 04:29:38
Subject: [Bacula-users] Concurrent despooling Data with Concurrent Jobs
From: Jummo <jummo AT devio DOT us>
To: bacula-users AT lists.sourceforge DOT net
Date: Thu, 9 Aug 2012 10:27:00 +0200 (CEST)
Hi,

One more question about Data Spooling and Concurrent Jobs.

I have one autochanger with two tape drives. I have set Maximum Concurrent 
Jobs in the Director Resource to 4, the Maximum Concurrent Jobs in the 
Storage Resource of the bacula-dir configuration is set to 4. I schedule 
about 30 Jobs at night all with Spool Data = yes.

For review of my configuration I wrote a script to save the output from 
"status dir" to a file.

During the backup one copy job already run and use the first tape drive. 
In the output I can see that 4 Jobs runs concurrently (one was the copy 
job). A little bit later I noticed that 2 jobs despooling data at the same 
time. Will this means the jobs are mixed on the tape volume?



bconsole > status dir
...
1376 Increme  client1.2012-08-08_23.00.00_13 SD despooling Data
1377 Increme  client2.2012-08-08_23.00.00_14 SD despooling Data
1382 Increme  client3.2012-08-08_23.00.00_19 is running
...


To prevent this behaviour, should I set the Maximum Concurrent Jobs on the 
Device level to 1? But I think this will prevent the concurrent execution 
of jobs using the same device.


Thanks again,

  - Jummo

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