Hey,

Afaik one storage device can't open 2 volumes from the same pool. So u can use 
the same device, but u need different pools for your normal and virtualfull 
backups.
You need that for a working virtulfull anyway. Have a look at how copy and 
migrate jobs work. A lot of stuff is explained in that part of the manual. Hope 
this helps u.

Kind regards

Julian

-----Ursprüngliche Nachricht-----
Von: Tobias Brink [mailto:tobias.brink AT gmail DOT com] 
Gesendet: Samstag, 29. August 2009 19:25
An: bacula-users AT lists.sourceforge DOT net
Betreff: [Bacula-users] Using the VirtualFull level with disk backups

Hello.

I'm a little bit confused by the new virtual backup feature in Bacula
3.0.2.  I want to do weekly differential backups and monthly
VirtualFull jobs so that I never (rarely) need to do real full backups
which take a lot of time.

The problem is that it is impossible to use the same device and pool
for the source and destination of virtual backups.  This seems to be
because the device (even if it is just a directory on disk) can't open
2 volumes at once, resulting in a deadlock.

The only solution that comes to mind is using 2 different devices with
the same media type and using the same pool.  I ran this with

    run job=test-backup level=VirtualFull storage=test2-storage yes

where the normal storage (specified in the pool) is test-storage.
Both use a different device.  The configs for this are at the end of
the mail.  This also deadlocks wating for the storage daemon.

Using two different pools works for the first backup but then I have a
full backup in one pool and the differential backups in another pool.
Now the next VirtualFull job must read from both pools and write to
one of them which will again result in a deadlock.

The documentation[1] was not helpful here because it uses two
different pools (one on the disk and one on tape).  Google and
searching the list also yielded no answers.

So how do I use this new feature?

Thanks in advance,
Tobias

[1]http://www.bacula.org/manuals/en/concepts/concepts/New_Features.html

bacula-dir.conf:
================
[...]
Job {
  Name = test-backup
  Enabled = yes
  Type = Backup
  Level = Differential
  Accurate = yes
  Client = test-client
  FileSet = test-file-set
  Messages = Standard
  Pool = test-pool
  Storage = test-storage
  Maximum Concurrent Jobs = 20
}
FileSet {
  Name = test-file-set
  Include {
    File = /var/tmp/testdir
  }
}
Client {
  Name = test-client
  Address = localhost
  FDPort = 9102
  Catalog = MyCatalog
  Password = "1234567890"
}
Storage {
  Name = test-storage
  Address = localhost
  SDPort = 9103
  Password = "1234567890"
  Device = test-device
  Media Type = test-type
  Maximum Concurrent Jobs = 20
}
Storage {
  Name = test2-storage
  Address = localhost
  SDPort = 9103
  Password = "1234567890"
  Device = test2-device
  Media Type = test-type
  Maximum Concurrent Jobs = 20
}
Pool {
  Name = test-pool
  Pool Type = Backup
  Maximum Volume Jobs = 1
  # 100 MB
  Maximum Volume Bytes = 104857600
  Label Format = "test-"
  Next Pool = test-pool
  Storage = test-storage
}
[...]

bacula-sd.conf:
===============
[...]
Device {
  Name = test-device
  Archive Device = /var/tmp/foo
  Device Type = File
  Media Type = test-type
  Removable Media = no
  Random Access = yes
  Requires Mount = no
  Label Media = yes
  Automatic Mount = yes
}
Device {
  Name = test2-device
  Archive Device = /var/tmp/bar
  Device Type = File
  Media Type = test-type
  Removable Media = no
  Random Access = yes
  Requires Mount = no
  Label Media = yes
  Automatic Mount = yes
}
[...]

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