Re: [Bacula-users] A device per pool

Sun, 08 Oct 2017 05:50:31 -0700

The idea of putting the PoolName and MediaType into the volume label at the time the code was written seemed reasonable, but it makes changing the volume rather inflexible.  As a consequence, though those fields are written, no one ever actually uses them.

Best regards,
Kern

On 08/09/2017 16:22, Dan Langille wrote:
On Sep 8, 2017, at 6:47 AM, Martin Simmons <[email protected]> wrote:

That's a useful article.

Thank you.

There is a minor caveat when copying volume files: the volume label contains
the PoolName and MediaType.  This is minor because it only matters if you need
to bscan the volume before it is recycled.

I hope nobody ever has to use bscan. (using bscan means something has gone wrong;
this is not a criticism of the tool).

I don't think we can easily change that label.  For those reading, here is an older document

As you say, it won't be relevant until bscan time.

-- 
Dan Langille - BSDCan / PGCon
[email protected]




__Martin



On Thu, 7 Sep 2017 22:04:35 -0400, Dan Langille said:

I have recently moved to one Storage device per pool.

Why?

So each pool is on a different ZFS dataset.

Once I figured out the process for the first one, the rest was mostly waiting for data to be copied.

I documented it here: https://dan.langille.org/2017/09/06/bacula-ran-out-of-space-moved-some-volumes-to-another-zpool/ <https://dan.langille.org/2017/09/06/bacula-ran-out-of-space-moved-some-volumes-to-another-zpool/>

The final zfs layout looks like this: https://gist.github.com/dlangille/78811ba69b2a14f6c1e63c2b4bafc99e <https://gist.github.com/dlangille/78811ba69b2a14f6c1e63c2b4bafc99e>

Here is the rough overview:


# in bacula-dir.conf

Pool {
 Name             = DiffFile
 Pool Type        = Backup
 Recycle          = yes
 AutoPrune        = yes
 Volume Retention = 6 weeks
 Storage          = bacula-sd-01-DiffFile
 Next Pool        = Differentials

 Maximum Volume Bytes = 10G
 Maximum Volume Jobs  = 1
 Maximum Volumes      = 300

 LabelFormat = "DiffAuto-"
}

# Definiton of file storage device
Storage {
 Name       = bacula-sd-01-DiffFile
 Address    = bacula-sd-01.int.unixathome.org                # N.B. Use a fully qualified name here
 SDPort     = 9103
 Password   = "[redacted]"

 AutoChanger = Yes

 Device     = VirtualDisk-DiffFile
 Media Type = DiffFile

 Maximum Concurrent Jobs = 27
}

# in bacula-sd.conf

# why do I do an autochanger? Some AutoChangers have multiple drives.
# It's easier to make them all similar.
# an example with 10 virtual drives is here: https://gist.github.com/dlangille/ba787f6e6d838d2fbcc6ad9aad9afd55 <https://gist.github.com/dlangille/ba787f6e6d838d2fbcc6ad9aad9afd55>

Autochanger {
 Name = VirtualDisk-DiffFile

 Changer Device  = /dev/null
 Changer Command = /dev/null

 Device          = vDrive-DiffFile-0
}

Device {
 Name           = vDrive-DiffFile-0
 Media Type     = DiffFile
 Archive Device = /usr/local/bacula/volumes/DiffFile
 LabelMedia     = yes
 Random Access  = yes
 AutomaticMount = yes
 RemovableMedia = no
 AlwaysOpen     = no

 Autochanger    = yes
 Drive Index    = 0

 Maximum Concurrent Jobs = 1
 Volume Poll Interval    = 15
}




Dan Langille - BSDCan / PGCon
[email protected]

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