> Hello,
>
> 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, 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, 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, I'm getting at least 1MByte/second backing up Windows machines
running under Xen (not Citrix XenServer though), 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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