Bacula-users

Re: [Bacula-users] [Bacula-devel] request: Allow tape drives to be associated with autochanger resource on different host

2008-07-21 19:47:03
Subject: Re: [Bacula-users] [Bacula-devel] request: Allow tape drives to be associated with autochanger resource on different host
From: Kjetil Torgrim Homme <kjetilho AT linpro DOT no>
To: bacula-users AT lists.sourceforge DOT net
Date: Tue, 22 Jul 2008 01:46:38 +0200
"John Drescher" <drescherjm AT gmail DOT com> writes:
> Kjetil Torgrim Homme <kjetilho AT linpro DOT no> wrote:
>> "Shad L. Lords" <slords AT lordsfam DOT net> writes:
>>> Item  1: Allow tape drives to be associated with autochanger
>>>           resource on different host
>>>     Note: A single robot controls multiple drives but is only connected
>>>           to one machine.  It is currently possible to work around
>>>           things by having remote hosts issue mtx commands over ssh but
>>>           nothing prevents multiple mtx commands from being issued at
>>>           the same time.
>>
>> why not use something like
>>
>>   ssh robotmaster "flock /var/run/mtx.lock mtx ..."
>>
>> as your tapechanger command?  flock will wait until it gets a lock on
>> the file, so there will never be two mtx processes running
>> simultaneously.

> The reason is that he wants to split up his tape multi drive changer
> so that the drives are on more than 1 machine to allow for higher
> performance but at the same time he wants to have 1 changer resource
> in bacula and send the jobs to the 1 changer.

Well, he didn't say so, IMHO.  You think he wants to schedule jobs
against a single Storage naming the tape changer, and have Bacula
figure out which SD to talk to?  That's quite different from today's
architecture, I think.

-- 
regards,
Kjetil T.


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