Slow write performance with Win 98 and Samba (fwd)

Christopher R. Hertel crh at
Thu Jun 21 17:37:49 GMT 2001

> Kenichi Okuyama wrote:
> > Before I start connecting windows machine, I run
> > # sysctl -w net.inet.tcp.delayed_ack=0
> George Fytikas of Sun Americas' Customer Engineering wrote:
> | tcp_deferred_ack_interval was at the centre of the investigation,
> | but it is "The time to wait before sending delayed ACK" in ms.
> | tcp_deferred_acks_max puts a cap on delayed ack.  The default 
> | is 8.  Setting it to 1 will make our tcp conform to the "ack 
> | every other packet" policy suggested  by rfc1122.  Setting it 
> | to 0 will disable delayed ack totally.
> 	This is worth trying on a Solaris Samba server to see
> 	if setting it to 1 will make the Windows TCP
> 	stack perform...

Dave, can you do this for us?  It would be great if you could do the test 
both ways and see if the behavior changes.  I don't have access to an OS 
that offers this particular sysctl variable.


Chris -)-----

Christopher R. Hertel -)-----                   University of Minnesota
crh at              Networking and Telecommunications Services

    Ideals are like stars; you will not succeed in touching them
    with your choose them as your guides, and following
    them you will reach your destiny.  --Carl Schultz

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