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Re: [Bacula-users] Virtual autochangers: how to "reserve" devices and "media type"
2016-07-01 10:06:50
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On 7/1/2016 5:17 AM, Area de Sistemas
wrote:
Hi,
We have been using bacula with DISK BASED BACKUP during
years (in a multi-pool, multi-device configuration)
Recently we have "redefined" the devices as autochangers
according the Bacula documentation.
Although the "whole thing" appears to be running ok we have
TWO questions:
1) In the previous "device mode", the MediaType of all
defined devices was set as "File"...Now, in the "autochanger
mode" I've also used the same MediaType "File" for ALL devices
in ALL autochangers...
* Is this right or MUST I use a different MediaType for
every autochanger (in all its devices)?
A different MediaType should be used for each autochanger. This is
because a volume on one autochanger cannot be "loaded" into another,
since the volume files are on different disks.
* If I must use a different MediaType...the change
implies some problem with existent volumes? Must I do/change
something with the existent volumes?
Maybe not. If you also use different pools for each autochanger, so
that each pool contains volumes from only one autochanger, then it
might not matter. Jobs using a single pool would only ever use one
autochanger. However, with pools that have volumes from more than
one autochanger, there is a problem. A job is only assigned a single
device to write on, so if the pool contains volumes that are on
another device, then Bacula may select a volume that cannot be
loaded into the assigned device. This is why the MediaType should be
different for each autocahnger. It prevents Bacula from selecting a
volume from a pool that cannot be used in the assigned device.
2) According Bacula documentation is possible to "reserve"
a device in an autochanger setting the property
"Autoselect=no" in that device definition but...
* How can I force bacula to use these reserved devices
for a restore command?
* The Bacula documentation sais that this can be done
but NOT HOW, and apparently the restore command (at least
interactively) only permits specify the Storage, not the
device...
Regards.
--
Jose Manuel Blanco.
Area de
Sistemas
Servicio de las Tecnologias de la Informacion y
Comunicaciones (STIC)
Universidad de Valladolid
Edificio Alfonso VIII, C/Real de Burgos s/n. 47011,
Valladolid - ESPAÑA
Telefono: 983 18-6410, Fax: 983 423271
E-mail: sistemas AT uva DOT es
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