I'm running a backup from my Fileserver VM to the Bacula VM.  Both guests are 
on the same VM host.

When I run an iperf I can pull 7Gb/s in an out.

When Bacula runs it tops out at 100MBit network usage.  This is with Spooling 
on and off.

Here is a screen shot of bacula doing it's backup run:
http://screencast.com/t/yWTZUpRz5wji

Here is a screen shot of the iperf tests:
http://screencast.com/t/ALpGEuHm0rn


Tape section from bacula-sd.conf file:

Autochanger {
  Name = "TL2000-Autochanger"
  Device = TL2000-LTO5-0, TL2000-LTO5-1
  Changer Command = "/etc/bacula/scripts/mtx-changer %c %o %S %a %d"
  Changer Device = /dev/sg3
}

Device {
  Name = "TL2000-LTO5-0"
  Drive Index = 0
  Media Type = LTO5
  Device Type = Tape
  Archive Device = /dev/nst0
  AutomaticMount = yes;               # when device opened, read it
  AlwaysOpen = yes;
  LabelMedia = no;
  RemovableMedia = yes;
  RandomAccess = no;
  AutoChanger = yes
  Autoselect = yes
#  Maximum Network Buffer Size = 131072
  Maximum Network Buffer Size = 65536
#  Maximum Block Size = 262144
  Spool Directory = /srv/backup_spool
#  Maximum Spool Size = 5368709120   #  5GB
  Maximum Spool Size = 10737418240  #  10GB
#  Maximum Spool Size = 16106127360  #  15GB
#  Maximum Spool Size = 21474836480  #  20GB
#  Maximum File Size = 10G
  Maximum File Size = 5G
  Maximum Concurrent Jobs = 1
}

Device {
  Name = "TL2000-LTO5-1"
  Drive Index = 1
  Media Type = LTO5
  Device Type = Tape
  Archive Device = /dev/nst1
  AutomaticMount = yes;               # when device opened, read it
  AlwaysOpen = yes;
  LabelMedia = no;
  RemovableMedia = yes;
  RandomAccess = no;
  AutoChanger = yes
  Autoselect = yes
# Maximum Network Buffer Size = 131072
  Maximum Network Buffer Size = 65536
#  Maximum Block Size = 262144
  Spool Directory = /srv/backup_spool
#  Maximum Spool Size = 5368709120   #  5GB
  Maximum Spool Size = 10737418240  #  10GB
#  Maximum Spool Size = 16106127360  #  15GB
#  Maximum Spool Size = 21474836480  #  20GB
#  Maximum File Size = 10G
  Maximum File Size = 5G
  Maximum Concurrent Jobs = 1
}

Client's bacula-fd.conf:

FileDaemon {                          # this is me
  Name = spartan-fd
  FDport = 9102                  # where we listen for the director
  WorkingDirectory = /var/lib/bacula
  Pid Directory = /var/run/bacula
  Maximum Concurrent Jobs = 20
  Maximum Network Buffer Size = 65536
#  Maximum Network Buffer Size = 131072
  FDAddress = 10.10.10.17
}


Any other information needed to debug?

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