our onfiguration

- 2 DELL servers each with four AMD Quadcore CPUs.
- Suse Linux 11.0 - Kernel 2.6.25
- The servers are coupled over a fibre channel
   by heartbeat
- Dell PowerVault TL2000 Tape Library (LTO4)
   attached over SAS to Server #2
- Bacula release 2.4.2 Director is running on Server #2


Backup via Ethernet (1GBit) from Server #1

   Scheduled time:         08-Jan-2009 21:05:00
   Start time:             08-Jan-2009 21:06:52
   End time:               08-Jan-2009 21:15:08
   Elapsed time:           8 mins 16 secs
   Priority:               10
   FD Files Written:       35,606
   SD Files Written:       35,606
   FD Bytes Written:       13,569,315,322 (13.56 GB)
   SD Bytes Written:       13,576,757,891 (13.57 GB)
   Rate:                   27357.5 KB/s

Backup local on Server #2

   Scheduled time:         08-Jan-2009 21:05:00
   Start time:             08-Jan-2009 21:15:10
   End time:               08-Jan-2009 22:32:52
   Elapsed time:           1 hour 17 mins 42 secs
   Priority:               10
   FD Files Written:       40
   SD Files Written:       40
   FD Bytes Written:       11,377,265,327 (11.37 GB)
   SD Bytes Written:       11,377,270,876 (11.37 GB)
   Rate:                   2440.4 KB/s

The local backup on server #2 slows down any other network traffic to
server #2 significantly.
Switching on the Bacula job spooling feature did not help at all:

  Data-rate server #1 :19247.3 KB/s
  Data-rate server #2 : 4527.4 KB/s

-- 
Ralf Brinkmann




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