W dniu 24 sierpnia 2010 00:35 użytkownik Kern Sibbald <[email protected]>napisał:
> > Yes, you are right. Bacula treats every Device as tape drive whatever it
> is
> > actually tape drive or hard disk.
>
> Bacula does not treat every device like a tape drive -- it had disk I/O
> before
> it had tape I/O.
>
> > This means Bacula can execute only one job for every device because this
> is
> > a restriction of single tape drive.
>
> This has absolutely nothing to do with tape drives. The restriction is
> because Bacula has a single file descriptor per device, and with a single
> descriptor, you can only do a single restore at a time. To restore
> multiple
> files simultaneously from the same Volume you *must* have multiple file
> descriptors or somehow multiplex a single file descriptor.
>
You better know Bacula history then me :)
I juts read a source code and explain it in that way.
> >
> > My solution to this problem is to create "virtual autochanger", that
> >
> > > will have more than one Device and will be able to run more then one
> > > restore job at the time, here is my configuration:
>
> You can run multiple restore jobs either with or without a virtual
> autochanger -- Bacula handles multiple devices without treating them as
> autochangers. However, I don't believe you will be able to restore
> multiple
> files simultaneously from the same Volume.
>
Absolutely, but every file device must have different archive device
otherwise it will not work.
> >
> > Till now, there are two possible solutions: "virtual autochanger" with
> > custom Changer Command or vtape device.
>
> The third solution is simpler -- just have multiple devices.
>
>
With restriction above. You can't share volume between different devices.
> Kern
>
>
Radek
--
Radosław Korzeniewski
[email protected]
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