[Bacula-users] Spooling and transfer rates

[Clark, P. A. <cl...@or...>]

I have data spooling turned on as the default.  I have blocking on my tapes set to 2MB.  The file systems that I am backing up are mounted to the backup server.

Am I correct in interpreting the despooling lines that the transfer rate is the speed that the backup is writing to tape?  How do I interpret the transfer rate on the Job write elapsed time and further down the standalone line of Rate: 29932.1 KB/s?  I am trying to get the maximum performance from my backups and this fileset is an indicator of how the rest of my major backups will perform (Question on fileset config in another post).  I am concerned that as a 1 TB file system, my multi-TB file systems will take days.  Should I spool for the Full backups?
>>>>>>>
12-Jun 02:23 back1-sd JobId 195: Despooling elapsed time = 01:43:40, Transfer rate = 80.38 M Bytes/second
12-Jun 02:23 back1-sd JobId 195: Spooling data again ...
12-Jun 05:17 back1-sd JobId 195: User specified spool size reached.
12-Jun 05:17 back1-sd JobId 195: Writing spooled data to Volume. Despooling 500,001,646,248 bytes ...
12-Jun 07:14 back1-sd JobId 195: Despooling elapsed time = 01:54:36, Transfer rate = 72.71 M Bytes/second
12-Jun 07:14 back1-sd JobId 195: Spooling data again ...
12-Jun 07:25 back1-sd JobId 195: Job write elapsed time = 09:18:47, Transfer rate = 30.16 M Bytes/second
12-Jun 07:25 back1-sd JobId 195: Committing spooled data to Volume "071571L5". Despooling 11,503,866,756 bytes ...
12-Jun 07:28 back1-sd JobId 195: Despooling elapsed time = 00:02:36, Transfer rate = 73.74 M Bytes/second
12-Jun 07:28 back1-sd JobId 195: Sending spooled attrs to the Director. Despooling 117,122,059 bytes ...
12-Jun 07:28 back1-dir JobId 195: Bacula back1-dir 5.2.6 (21Feb12):
  Build OS:               x86_64-redhat-linux-gnu redhat Enterprise release
  JobId:                  195
  Job:                    homedirs1.2012-06-11_22.05.00_14
  Backup Level:           Full (upgraded from Incremental)
  Client:                 "back1-fd" 5.2.6 (21Feb12) x86_64-redhat-linux-gnu,redhat,Enterprise release
  FileSet:                "homedirs1 Set" 2012-06-11 15:18:49
  Pool:                   "Admin" (From Job resource)
  Catalog:                "MyCatalog" (From Client resource)
  Storage:                "Changer" (From Pool resource)
  Scheduled time:         11-Jun-2012 22:05:00
  Start time:             11-Jun-2012 22:05:41
  End time:               12-Jun-2012 07:28:45
  Elapsed time:           9 hours 23 mins 4 secs
  Priority:               10
  FD Files Written:       348,669
  SD Files Written:       348,669
  FD Bytes Written:       1,011,225,151,816 (1.011 TB)
  SD Bytes Written:       1,011,283,529,561 (1.011 TB)
  Rate:                   29932.1 KB/s
  Software Compression:   None
  VSS:                    no
  Encryption:             no
  Accurate:               no
  Volume name(s):         071571L5
  Volume Session Id:      51
  Volume Session Time:    1338556034
  Last Volume Bytes:      1,178,167,320,576 (1.178 TB)
  Non-fatal FD errors:    0
  SD Errors:              0
  FD termination status:  OK
  SD termination status:  OK
  Termination:            Backup OK
<snip>
>>>>>>>

Patti Clark
Information International Associates, Inc.
Linux Administrator and subcontractor to:
Research and Development Systems Support Oak Ridge National Laboratory