You may wish to prevent ssh from using compression when using a fast
link, the overhead probably isn't worth it and may give you a reasonable
boost in throughput.
Like Koen said, you'll want to benchmark the different scenarios.
Regards,
Colin
On 16/10/14 16:28, Koen Vermeer wrote:
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] local192.168.0.8 <http://192.168.0.8> port 51754 connected
with192.168.0.9 <http://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.
--
Sent from Kaiten Mail. Please excuse my brevity.
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c.sho...@intrallect.com
+44 (0) 131 292 0104
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Comprehensive Server Monitoring with Site24x7.
Monitor 10 servers for $9/Month.
Get alerted through email, SMS, voice calls or mobile push notifications.
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