Bacula-users

Re: [Bacula-users] [Bacula-devel] feature request: "Maximum Concurrent Jobs" for drives when used with changer device

2009-02-04 04:26:34
Subject: Re: [Bacula-users] [Bacula-devel] feature request: "Maximum Concurrent Jobs" for drives when used with changer device
From: Kern Sibbald <kern AT sibbald DOT com>
To: bacula-devel AT lists.sourceforge DOT net
Date: Wed, 4 Feb 2009 10:24:20 +0100
Hello,

I have added this Feature Request to the projects list for the next vote -- 
probably a month or two from now.

Best regards,

Kern

On Friday 12 December 2008 10:47:42 Ralf Gross wrote:
> Item 1:   "Maximum Concurrent Jobs" for drives when used with changer
> device Origin: Ralf Gross ralf-lists <at> ralfgross.de
>   Date:   2008-12-12
>   Status: Initial Request
>
>   What:   respect the "Maximum Concurrent Jobs" directive in the _drives_
>           Storage section in addition to the changer section
>
>   Why:    I have a 3 drive changer where I want to be able to let 3
> concurrent jobs run in parallel. But only one job per drive at the same
> time. Right now I don't see how I could limit the number of concurrent jobs
> per drive in this situation.
>
>   Notes:  Using different priorities for these jobs lead to problems that
> other jobs are blocked. On the user list I got the advice to use the
> "Prefer Mounted Volumes" directive, but Kern advised against using "Prefer
> Mounted Volumes" in an other thread:
>          
> http://article.gmane.org/gmane.comp.sysutils.backup.bacula.devel/11876/
>
>           In addition I'm not sure if this would be the same as respecting
> the drive's "Maximum Concurrent Jobs" setting.
>
>           Example:
>
>           Storage {
>             Name = Neo4100
>             Address = ....
>             SDPort = 9103
>             Password = "wiped"
>             Device = Neo4100
>             Media Type = LTO4
>             Autochanger = yes
>             Maximum Concurrent Jobs = 3
>           }
>
>           Storage {
>             Name = Neo4100-LTO4-D1
>             Address = ....
>             SDPort = 9103
>             Password = "wiped"
>             Device = ULTRIUM-TD4-D1
>             Media Type = LTO4
>             Maximum Concurrent Jobs = 1
>           }
>
>           [2 more drives]
>
>           The "Maximum Concurrent Jobs = 1" directive in the drive's
> section is ignored.
>
>
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