Thanks for the pointer.

I've re-compiled with 

define STREAM_BUFSIZE         (NETWORK_BLOCK_BYTES * 16)

And I can see that has taken effect on the server

dumper: try_socksize: send buffer size is 524288

But backups are running no faster and I cannot see any indication on the client 
of the buffer size being used. Note: client also has the new binaries. In older 
versions of AMANDA amandad used to report buffer size, but this appears to not 
be the case in 2.6.1p1.

Thanks,

Alan

> Date: Mon, 19 Oct 2009 10:03:21 -0400
> Subject: Re: TCP Tuning
> From: dus...@zmanda.com
> To: ap_griffi...@hotmail.com
> CC: amanda-users@amanda.org
> 
> On Mon, Oct 19, 2009 at 5:33 AM, Alan Griffiths
> <ap_griffi...@hotmail.com> wrote:
> > Is there a way to modify the size of the TCP buffers used by AMANDA? I am
> > trying to improve performance over a relatively high latency link and this
> > seems to be the only way.
> 
> It's a source constant, unfortunately, set in stream.h (STREAM_BUFSIZE).
> 
> A patch to make that configurable at compile time or, better, at
> runtime would be much appreciated!
> 
> Dustin
> 
> -- 
> Open Source Storage Engineer
> http://www.zmanda.com
                                          
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