On 20-11-2014 12:28, Kern Sibbald wrote:

Hello,

There are a number of different ways to write to several drives at the same time.  They are listed with the preferred solution (for most cases) first and the worst solution last.

1. This is probably the simplest and best.  Simply limit the number of simultaneous jobs by putting a Maximum Simultaneous Jobs = nn inside each Device resource in your bacula-sd.conf file.  Bacula version 7.0.x comes with this directive in the Device resources as a default.

For multi-drive configs, Maximum Concurrent Jobs = nn setting is recommended in Storage and Director resource in bacula-dir.conf and storage resource in bacula-sd.conf. Do you suggest to use it in only Device resource in bacula-sd.conf omitting the others?

2. As other people have pointed out, direct the output of different jobs to different Pools.  This is very good for separating backups by say department, but is not an ideal way to limit concurrency.

3. Set Prefer Mounted Volumes = no.  I *strongly* recommend against using this directive. It will inevitably lead to problems.

Best regards,
Kern

On 11/18/2014 10:39 AM, Süleyman Kuran wrote:

Hi,

I am trying to make bacula use multi drives in a Fujitsu Tape Library with no success. Recently I added 3 more drives to bacula configuration to reduce backup time. But bacula insists on using only the first drive. Backup jobs are not sent to other suitable tape drives. Jobs are started at the same time and queued. Jobs in the queue is waiting for the previous job to finish even if there is a valid media (tape) for the pool and other drives are idle. I can mount other drives manually. Is there any other setting I'm missing to make use of multi-drives? Please advise.

Regards,

Suleyman

==================================================================================
CentOS release 6.5 (Final)
Bacula version 5.0.0-12.el6

Config files:

bacula-sd.conf
==================================================================================
Storage {                             # definition of myself
  Name = bacula-sd
  SDPort = 9103                  # Director's port     
  WorkingDirectory = "/var/spool/bacula"
  Pid Directory = "/var/run"
  Maximum Concurrent Jobs = 2
}
....
Autochanger {
  Name = AYKAutochanger
  Device = Drive-1
  Device = Drive-2
  Device = Drive-3
  Device = Drive-4
  Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg9
}
Device {
  Name = Drive-1
  Drive Index = 0
  Media Type = LTO-5
  Archive Device = /dev/nst0
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Random Access = no
  Maximum File Size = 10GB
  Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg9
  AutoChanger = yes
}
Device {
  Name = Drive-2
  Drive Index = 1
  Media Type = LTO-5
  Archive Device = /dev/nst1
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Random Access = no
  Maximum File Size = 10GB
  Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg9
  AutoChanger = yes
  Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
}
Device {
  Name = Drive-3
  Drive Index = 2
  Media Type = LTO-5
  Archive Device = /dev/nst2
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Random Access = no
  Maximum File Size = 10GB
  Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
#  Changer Device = /dev/changer
  Changer Device = /dev/sg9
  AutoChanger = yes
  Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
}
Device {
  Name = Drive-4
  Drive Index = 3
  Media Type = LTO-5
  Archive Device = /dev/nst3
  AutomaticMount = yes
  AlwaysOpen = yes
  RemovableMedia = yes
  Random Access = no
  Maximum File Size = 10GB
  Changer Command = "/usr/libexec/bacula/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg9
  AutoChanger = yes
  Alert Command = "sh -c 'tapeinfo -f %c |grep TapeAlert|cat'"
}
...
===========================================================================
bacula-dir.conf

Director {                            # define myself
  Name = bacula-dir
  DIRport = 9101                # where we listen for UA connections
  QueryFile = "/etc/bacula/query.sql"
  WorkingDirectory = "/var/spool/bacula"
  PidDirectory = "/var/run"
  Maximum Concurrent Jobs = 2
  Password = "mypassword"         # Console password
  Messages = Daemon
}
JobDefs {
  Name = "MyJobDefs"
  Type = Backup
  Storage = "Fujitsu ETERNUS LT60"
  Max Start Delay = 36000 #do not start jobs after 10 hours
  Messages = Standard
  Pool = Default # will be overwritten by MultipleRUN Schedule
  #Write Bootstrap = "/var/spool/bacula/%c.bsr"
  Prefer Mounted Volumes = no
}
Job {
  Name = "EbysFileBackup"
  JobDefs = "MyJobDefs"
  Client = bacula-fd
  FileSet="EbysFiles"
  Schedule = "MultipleRUN"
  Priority = 10
}
Job {
  Name = "LoggerBackup"
  JobDefs = "MyJobDefs"
  Client = logger-fd
  FileSet="Logger"
  Schedule = "MultipleRUN"
  Priority = 15
}
Job {
  Name = "RadiusBackup"
  JobDefs = "MyJobDefs"
  Client = radius-fd
  FileSet="RadiusFiles"
  Schedule = "MultipleRUN"
  Priority = 20
}
Schedule {
  Name = "MultipleRUN"
  Run = Level=Full Pool=Daily mon-thu at 2:17
  Run = Level=Full Pool=Daily 2nd-5th fri at 2:17
  Run = Level=Full Pool=Daily 2nd-5th sat at 2:17
  #never run Daily on 1st
  Run = Level=Full Pool=Weekly sun at 2:17
  #Run = Level=Incremental Pool=Weekly mon-sat at 19:05
  Run = Level=Full Pool=Monthly 1st sat at 2:17
  #Run = Level=Incremental Pool=Monthly sun-fri at 2:05
  Run = Level=Full Pool=Offsite 1st fri at 2:17
}
Client {
  Name = radius-fd
  Address = client-address
  FDPort = 9102
  Catalog = MyCatalog
  Password = "mypassword"         # password for FileDaemon 2
}
Storage {
  Name = "Fujitsu ETERNUS LT60"
  Address = sd-FQDN-address                # N.B. Use a fully qualified name here
  SDPort = 9103
  Password = "mypassword"          # password for Storage daemon
  Device = AYKAutochanger
  Media Type = LTO-5                  # must be same as MediaType in Storage daemon
  Autochanger = yes                   # enable for autochanger device
  Maximum Concurrent Jobs = 2
}
Pool {
  Name = Daily
  Pool Type = Backup
  Recycle = yes                       # Bacula can automatically recycle Volumes
  AutoPrune = yes                     # Prune expired volumes
  Volume Retention = 7 days
  Cleaning Prefix = "CLN"
  Maximum Volume Bytes = 4924983103488
}
Pool {
  Name = Weekly
  Pool Type = Backup
  Recycle = yes                       # Bacula can automatically recycle Volumes
  AutoPrune = yes                     # Prune expired volumes
  Volume Retention = 30 days
  Cleaning Prefix = "CLN"
  Maximum Volume Bytes = 4924983103488
}

#fileset definitions and some unrelated config snipped
============================================================
bacula-fd.conf

FileDaemon {                          # this is me
  Name = bacula-fd
  FDport = 9102                  # where we listen for the director
  WorkingDirectory = /var/spool/bacula
  Pid Directory = /var/run
  Maximum Concurrent Jobs = 2
}
....
snipped

=========================================================

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