On October 16, 2014 2:25:53 PM CEST, Sorin Srbu <Sorin.Srbu AT orgfarm.uu DOT se> wrote:

Hi all,

I'm seeing network speeds at about 35-45 Mbps when using BackupPC and rsync over ssh.

Running iperf below I notice the network should theoretically be capable of a bit more than that. I understand that ssh adds quite a bit of bottleneck.

[root@titan ~]# iperf -c cyndane

Client connecting to cyndane, TCP port 5001
TCP window size: 42.5 KByte (default)

[  3] local 192.168.0.8 port 51754 connected with 192.168.0.9 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec   398 MBytes   334 Mbits/sec
[root@titan ~]#

Just to clarify, titan above is the BPC-server and has some local disk space where the backup pool is. Cyndane is the host being backed up. Both have gigabit-NIC's and a ditto switch between them.

After reading one of the answers at <<http://serverfault.com/questions/377598/why-is-my-rsync-so-slow>>, I kinda' wonder if the NFS-angle would work for use with BackupPC and how I would go about it. Is the tar transfer method the only one supported by BPC if using NFS for example?
Rsyncing a NFS-mounted remote host supposedly is a lot faster than doing rsync over ssh.

Any thoughts on this? 
Has anybody on this list maybe set up their systems using NFS and can share their experience?

Thanks.

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