I have noticed that w9x clients typically do not have a performance issue.
I have noticed the same behavior with NT and 2k clients. I notice (on a win
client) the transfer progress bar increase very quickly then stops, hangs
for a moment (15 seconds or so) then increases again. Any ideas?
----- Original Message -----
From: "Paul M Foster" <paulf@quillandmouse.com>
To: <slug@nks.net>
Sent: Thursday, May 09, 2002 2:15 AM
Subject: Re: [SLUG] Slow SAMBA or what?
> On Wed, May 08, 2002 at 10:16:28PM -0400, Chuck Hast wrote:
>
> > I have a LINUX machine that I also use as a SAMBA box. I went to pull a
> > file over to a windows 2k machine from the SAMBA machine, the file is a
> > 74m directory, I am pulling it over a 100mb 100baseT connection 20
minutes
> > seems a bit LONG for that path, do I need to tweek something in my SAMBA
> > box? (I can't see anything to tweek in the windows box but then was
there
> > every anything TO tweek?)
> >
>
> Seems a little long, but...
>
> 1) You're dealing with TCP/IP, which puts overhead on top of the bytes
> you want to move. With 1500 byte packets, your overhead might be as much
> as 15-25%, I think. Plus, each packet must be "peeled" at each level of
> the protocol.
>
> 2) Since this is not the only thing your machine is doing, it must
> interrupt the transfer periodically to take care of other programs and
> housekeeping chores. That's true on both ends of the connection, since
> it's not synchronous.
>
> 3) You've also got disk latency, which is a bottleneck in a lot of
> operations; disk access is the slowest thing on a PC.
>
> 4) There may also be a problem with other traffic on the network. If
> other machines are also using the pipe, each must wait its turn to
> transfer bits.
>
> Anyway, this may not/probably doesn't explain it, but it's something to
> consider when looking at how long a file transfer takes.
>
> I don't think Samba is the problem, though. As far as I know, there's
> no "throttle" parameter on Samba. This sounds more like a link
> layer/transport layer/hardware layer problem.
>
> Paul
>
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