Hi Arno,

Thanks for the tip; that really helped. I set "Prefer Mounted Volume = no"
and jobs started getting on the other virtual drives as I expected. I did
not know that this directive affected concurrency...

Anyway, I'm still testing, and of course facing other problems that I'm
working my way through.

When I'm ready I will probably post a short note, and if our version of the
vchanger works well, then I will share it with the group, along with some
write up; but I've got to get it working first.

Thanks again,
Elie Azar





Arno Lehmann wrote:
> 
> Hi,
> 
> 07.11.2007 01:14,, Elie Azar wrote::
>> Hi Josh,
> 
> I'm not Josh, but perhaps I see something, too :-)
> 
>> I have upgraded to bacula 2.2.5 and I'm still having the same problems.
>> 
>> It seems like drive-1 in the vchanger is never used. Have you ever seen
>> it
>> used, and if so, what kind of configuration do I need; I followed the
>> instruction in the HowTo document (Rev 0.7.4 2006-12-12). I tried many
>> configurations but I still can't get it to run more than one job. If I
>> start
>> a second job it will fail.
> 
> You probably still have the volumes to accept only one Job, and the 
> jobs are probably set up to prefer the same volume.
> 
> To get the desired results, you have to carefully adjust the job 
> concurreny settings, and not forget about the "Prefer Mounted Volume" 
> directive.
> 
> By default, Bacula will try to run several jobs to a single volume if 
> one is already mounted.
> 
> So either you set up your jobs to use different pools, or set "Prefer 
> Mounted Volume" to No. Also, the "Maximum Concurrent Jobs" setting for 
> the storage device should be limited. If you set up your volumes to 
> only accept one Job, yozu should also allow only one job going to the 
> storage devices at the same time.
> 
> Does that make sense?
> 
> Arno
> 
>> What I'm trying to accomplish is the following: I created an LVM disk
>> using
>> 2x500GB disks. I created a vchanger with 2 virtual disks to backup to the
>> LVM. Originally I created the vchangers with multiple 500GB disks, but I
>> changed to use the LVM; that setup didn't work either. Even with one
>> vchanger per 500GB disk, I still couldn't start more than one job at a
>> time.
>> I can the relevant parts of my conf files if that helps.
>> 
>> I would like to run concurrent jobs to backup to different volumes on the
>> LVM disk. Bacula doesn't seem to be able to do that. Every time I start
>> more
>> than one job, each one after the first fails.
>> 
>> Here is a sample console output illustrating this problem:
>> 
>> *run
>> A job name must be specified.
>> The defined Job resources are:
>>      1: RestoreFiles
>>      2: BackupCatalog
>>      ................................
>> Select Job resource (1-122): 99
>> Run Backup job
>> JobName:  Redmail-FS
>> Level:    Incremental
>> Client:   redmail-fd
>> FileSet:  Redmail root dev dev-shm impulse
>> Pool:     BLV01Pool13 (From Job resource)
>> Storage:  BLV01S (From Job resource)
>> When:     2007-11-06 15:29:08
>> Priority: 10
>> OK to run? (yes/mod/no): yes
>> Job queued. JobId=13736
>> *
>> *mes
>> 06-Nov 15:29 coal-dir JobId 13736: Start Backup JobId 13736,
>> Job=Redmail-FS.2007-11-06_15.29.19
>> 06-Nov 15:29 coal-dir JobId 13736: Using Volume "BLV01m01s006" from
>> 'Scratch' pool.
>> 06-Nov 15:29 coal-dir JobId 13736: Using Device "BLV01-drive-0"
>> 06-Nov 15:29 redmail-fd: DIR and FD clocks differ by 18 seconds, FD
>> automatically adjusting.
>> 06-Nov 15:29 coal-sd JobId 13736: 3301 Issuing autochanger "loaded? drive
>> 0"
>> command.
>> 06-Nov 15:29 coal-sd JobId 13736: 3302 Autochanger "loaded? drive 0",
>> result
>> is Slot 5.
>> 06-Nov 15:29 coal-sd JobId 13736: 3307 Issuing autochanger "unload slot
>> 5,
>> drive 0" command.
>> 06-Nov 15:29 coal-sd JobId 13736: 3304 Issuing autochanger "load slot 6,
>> drive 0" command.
>> 06-Nov 15:29 coal-sd JobId 13736: 3305 Autochanger "load slot 6, drive
>> 0",
>> status is OK.
>> 06-Nov 15:29 coal-sd JobId 13736: 3301 Issuing autochanger "loaded? drive
>> 0"
>> command.
>> 06-Nov 15:29 coal-sd JobId 13736: 3302 Autochanger "loaded? drive 0",
>> result
>> is Slot 6.
>> 06-Nov 15:29 coal-sd JobId 13736: Wrote label to prelabeled Volume
>> "BLV01m01s006" on device "BLV01-drive-0"
>> (/var/lib/bacula/vchanger/BLV01/drive0)
>> 06-Nov 15:29 coal-dir JobId 13736: Max Volume jobs exceeded. Marking
>> Volume
>> "BLV01m01s006" as Used.
>> redmail-fd:      /sys is a different filesystem. Will not descend from /
>> into /sys
>> *
>> *
>> *run
>> A job name must be specified.
>> The defined Job resources are:
>>      1: RestoreFiles
>>      2: BackupCatalog
>>      ...................................
>> 
>> Select Job resource (1-122): 59
>> Run Backup job
>> JobName:  Linux2-Test1
>> Level:    Incremental
>> Client:   linux2-fd
>> FileSet:  Test Set
>> Pool:     BLV01Pool13 (From Job resource)
>> Storage:  BLV01S (From Job resource)
>> When:     2007-11-06 15:29:31
>> Priority: 10
>> OK to run? (yes/mod/no): yes
>> Job queued. JobId=1373*mes
>> 06-Nov 15:29 coal-dir JobId 13737: Start Backup JobId 13737,
>> Job=Linux2-Test1.2007-11-06_15.29.20
>> 06-Nov 15:29 coal-dir JobId 13737: There are no more Jobs associated with
>> Volume "BLV01m01s006". Marking it purged.
>> 06-Nov 15:29 coal-dir JobId 13737: All records pruned from Volume
>> "BLV01m01s006"; marking it "Purged"
>> 06-Nov 15:29 coal-dir JobId 13737: Recycled volume "BLV01m01s006"
>> 06-Nov 15:29 coal-dir JobId 13737: Using Device "BLV01-drive-0"
>> 06-Nov 15:29 coal-sd JobId 13737: Fatal error: Cannot recycle volume
>> "BLV01m01s006" on device "BLV01-drive-0"
>> (/var/lib/bacula/vchanger/BLV01/drive0) because it is in use by another
>> job.
>> 06-Nov 15:29 linux1-fd: Linux2-Test1.2007-11-06_15.29.20 Fatal error:
>> job.c:1752 Bad response to Append Data command. Wanted 3000 OK data
>> , got 3903 Error append data
>> 
>> 06-Nov 15:29 coal-dir JobId 13737: Error: Bacula coal-dir 2.2.5
>> (09Oct07):
>> 06-Nov-2007 15:29:36
>>   Build OS:               i686-pc-linux-gnu gentoo 1.12.6
>>   JobId:                  13737
>>   Job:                    Linux2-Test1.2007-11-06_15.29.20
>>   Backup Level:           Incremental, since=2007-11-06 12:22:01
>>   Client:                 "linux2-fd" 2.0.1 (12Jan07)
>> i686-pc-linux-gnu,gentoo,1.4.16
>>   FileSet:                "Test Set" 2007-10-22 13:46:08
>>   Pool:                   "BLV01Pool13" (From Job resource)
>>   Storage:                "BLV01S" (From Job resource)
>>   Scheduled time:         06-Nov-2007 15:29:31
>>   Start time:             06-Nov-2007 15:29:36
>>   End time:               06-Nov-2007 15:29:36
>>   Elapsed time:           0 secs
>>   Priority:               10
>>   FD Files Written:       0
>>   SD Files Written:       0
>>   FD Bytes Written:       0 (0 B)
>>   SD Bytes Written:       0 (0 B)
>>   Rate:                   0.0 KB/s
>>   Software Compression:   None
>>   VSS:                    no
>>   Encryption:             no
>>   Volume name(s):
>>   Volume Session Id:      13
>>   Volume Session Time:    1194375148
>>   Last Volume Bytes:      1 (1 B)
>>   Non-fatal FD errors:    0
>>   SD Errors:              0
>>   FD termination status:  Error
>>   SD termination status:  Error
>>   Termination:            *** Backup Error ***
>> *
>> *
>> *
>> 
>> _______________________________________________________________________
>> 
>> 
>> Elie Azar wrote:
>>> Hi,
>>>
>>> we're using vchanger, but bacula never seems to use more than the first 
>>> virtual drive, even though we have 10 defined in the storage Autochanger 
>>> directive for it.  why won't bacula use drive1, drive2, etc.  It does at 
>>> least look at these higher-numbered drives when the update slots command 
>>> is used, so it's not a config problem in terms of defining the virtual 
>>> drives within the autochanger.
>>>   
>> I don't believe bacula's volume reservation worked well with multiple 
>> drive autochangers before version 2.2.0. If you are using a pre-2.2.0 
>> release, then that is likely why bacula is not selecting another drive 
>> on the autochanger, even though it is loaded with a usable volume. For a 
>> single vchanger to be able to run multiple concurrent jobs (one on each 
>> virtual drive), you need bacula 2.2.0 or greater.
>> 
> 
> -- 
> Arno Lehmann
> IT-Service Lehmann
> www.its-lehmann.de
> 
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