What about testing the speed over the ssh tunnel? That may tell you whether ssh
is slowing down your transfers or that it's due to rsync. If it is ssh, you
could trade encryption strength for speed.
Best,
Koen
On October 16, 2014 2:25:53 PM CEST, Sorin Srbu <sorin.s...@orgfarm.uu.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.
>
>--
>BW,
> Sorin
>-----------------------------------------------------------
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>
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