I'm late answering this, but I suggest trying again with some TCP
offloading features disabled on the interface used by SD.
/sbin/ethtool -K ethX tso off gso off gro off
There are indeed buggy drivers that fail to properly support the
(virtual?) hardware offload features, including at least some version(s)
of virtio-net, as I discovered and wrote about in my August 5 2020 post
here. Keep in mind that Bacula, of necessity, taxes the network for long
periods of time, often for hours. It reveals network issues that a few
seconds or minutes of iperf cannot. (In fact, I think virtio developers
should consider using bacula-fd in a VM in their destructive/performance
testing.)
On 12/8/20 2:55 PM, Satvinder Singh wrote:
Hi,
I have been testing out bacula for past few weeks. I have setup jobs for linux
and windows clients (server 2016 and server 2019). The linux backups are
running well, with almost gigabit speeds as we have a gigabit backbone network.
But then windows backups are extremely slow averaging around 65kbps. I have
tested the network connectivity between the backup server and clients using
iperf and there is no issue there I see speeds of over 700mbps. I have also
tried disabling VSS and enabling Spool Data but no change. I have also tried
the Maximum Network Buffer Size = 32768 on the client but still no change.
There is no firewall running on the windows machine.
Has anyone seen this any help is greatly appreciated.
Thanks
Satvinder
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