Re: ANS4017E Session rejected: TCP/IP communications failure
1996-02-06 10:06:38
Subject: |
Re: ANS4017E Session rejected: TCP/IP communications failure |
From: |
Susan McClure <smcclure AT IS.RICE DOT EDU> |
Date: |
Tue, 6 Feb 1996 09:06:38 -0600 |
On Feb 5, 2:11pm, Brett Walker (408)256-0265 wrote:
> Subject: Re: ANS4017E Session rejected: TCP/IP communications failure
> >> One other thing that you could try would be to reduce the size of
> >> the TCPWindowsize and TCPBuffsize parameters. In our quest for
performance
> >> we tend to bump these values up to their maximum, but on some networks
this
> >> may be detrimental.
> >>
> >> Just a thought ;-)
> >>
> >> Brett Walker
> >> ADSM Development
> >>-- End of excerpt from Brett Walker (408)256-0265
> >
> >Brett-- if the window and buffers are too large, don't you see "out of
memory"
> >problems on the
> >client first ??? I did try massaging these numbers many times for one
> >particular client who
> >always got tcpip errors.... but it never seemed to help.
> >
> >susie McClure
> >Rice University
>
> If you try to bump them up WAY high, maybe. But you might see problems
> if you had them only at 64K.
>
> I know that MacTCP had problems (I think it still does) where if there
> were packets unacknowledged, it would retransmit all the packets in the
> tcp window. The bigger the window size, the more likely it would have
> to retransmit a lot of packets. This could cause intermittent drops.
>
> Brett Walker
> ADSM Development
>-- End of excerpt from Brett Walker (408)256-0265
Brett- AAAAHHHH, the unit in question was a MAC with MACTCP. I now have the
windows & buffers set just a little over the default, have increased
commitimeout to 10 minutes and have set commandretries way up for this user....
It is a very severely overloaded system, very slow.... and now, I actually
successfully complete a scheduled incremental about 1 out of 4-5 evenings.
Most Macs I back up once a week... this one is set to back up every night in
hopes that I just might be successful once in a while.
There's got to be a better way.....
Susie McClure
Rice University
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