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

"John Drescher" <drescherjm@xxxxxxxxx> writes:
> Kjetil Torgrim Homme <kjetilho@xxxxxxxxx> wrote:
>> "Shad L. Lords" <slords@xxxxxxxxxxxx> 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.

Kjetil T.

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