I have had luck with setting tcpwindowsize 0 on server and client and
letting the OS handle it.
Also diskbuffsize 512.

Hans Chr.

On Thu, Feb 18, 2016 at 8:15 PM, Skylar Thompson <skylar2 AT u.washington DOT 
edu>
wrote:

> I thought TCPBUFFSIZE could only go up to 64? It could be that setting it
> to 512 actually sets it to the default of 16.
>
> On Thu, Feb 18, 2016 at 02:03:26PM -0500, Tom Alverson wrote:
> > I am seeing very poor WAN performance on all of my (wan based) TSM
> > backups.  Due to the latency (40 msec typical) I normally only get about
> > 20% of the available bandwidth used by a TSM backup.  With EMC Networker
> I
> > get over 90% utilization.  I have already set all of these recommended
> > options:
> >
> > RESOURCEUTILIZATION 2
> >
> > TXNBYTELIMIT 2097152
> >
> > TCPNODELAY YES
> >
> > TCPBUFFSIZE 512
> >
> > TCPWINDOWSIZE 2048
> >
> > LARGECOMMBUFFERS YES
> >
> >
> > Does anyone know of anything else that could help performance?  Has
> anyone
> > used a Riverbed accelerator for TSM backups?
> >
> >
> > Tom
>
> --
> -- Skylar Thompson (skylar2 AT u.washington DOT edu)
> -- Genome Sciences Department, System Administrator
> -- Foege Building S046, (206)-685-7354
> -- University of Washington School of Medicine
>