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Backup Central Discussion boards Forum Index » Bacula » Slow backups under XenServer with Windows2003 SP1/R2guests Hello,Office 2010 Professionnel Plus, So i am trying to back up my file server with Bacula and i am
having
a difficult time getting it to work. I am able to back up desktops at
7MB/s, non-virtualized windows servers at 4.7MB/s,windows 7 ultimate x64, virtualized
desktops at 4.7MB/s and virtualized windows servers at 100KB/s.....?? The servers are any of Windows 2003 SP1 or Windows 2003 R2, the
desktops (virtualized or not) are Windows XP SP3/SP2. My hosts server
all run Citrix XenServer Enterprise,microsoft office Pro 2007 activation key, running on HP blades with 8GB
of RAM and dual quad core CPUs on SAS HDDs. The VMs storage resides
in an HP EVA4400 connected via fiber. If i mount server1's (virtualized windows 2003) share on the
bacula
server and copy the same amount of data(3.1GB) it gets done in about
6min. If i copy the data via "scp" it gets done in about 5min at a
rate of 11MB/s. But when i run bacula on any virtualized windows 2003 server the
data rate doesnt go higher than 200KB/s. NOTE: That i am backing all this up to disk.
FWIW,windows 7 x86, I'm getting at least 1MByte/second backing up Windows machines
running under Xen (not Citrix XenServer though),microsoft office 2010 64 bit, so I don't think there
is anything inherently broken in Bacula although you didn't mention what
version you are running.
Try turning off the tcp offload features in Dom0 and windows and see if
that makes a difference. I suspect it won't if scp is working over the
exact same network link but many strange network bugs in the tcp offload
code start to surface once you start playing with virtualisation.
Otherwise, fire up wireshark in the Windows DomU and look for packet
retransmits etc that would indicate network problems.
James
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