Latency and Rsync Transfers

Neal B nrbwpi at
Mon Feb 1 11:11:58 MST 2010

Hi Ryan,

Thanks for your reply.  I have been experimenting with the buffer settings
and when specifying it actually causes the transfers to go slower.

I am running an rsync server using xinet.d and an rsync client.  I have
tried specifying the sockopts on just the client, server, and both.

Thanks in advance,


On Fri, Jan 29, 2010 at 9:33 AM, Ryan Malayter <malayter at> wrote:

> On Thu, Jan 28, 2010 at 10:43 AM, Neal B <nrbwpi at> wrote:
> > Hello,
> >
> > Working a few servers that are transferring data across country with a
> 75ms
> > delay on a GIGE connection.  We can tune the tcp buffers on linux to
> improve
> > the connections using iperf.  Does rsync use the tcp buffers of the OS or
> > does it override these settings?
> It will ise OS defaults unless you pass --sockopts to rsync.
> Like so:
> rsync --sockopts=SO_SNDBUF=128000,SO_RCVBUF=128000 <other options>
> --
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