Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!legato!mojo
From: mojo@legato (Joseph Moran)
Newsgroups: comp.protocols.nfs
Subject: Re: Speeding up PC-NFS
Message-ID: <960@legato.LEGATO.COM>
Date: 15 Sep 89 00:52:10 GMT
References: <952@legato.LEGATO.COM> <436@bimbo.UUCP>
Reply-To: mojo@legato (Joseph Moran)
Organization: Legato Systems, Inc., Palo Alto, CA
Lines: 31

In article <436@bimbo.UUCP> boyter@bimbo.UUCP (Maj Brian Boyter) writes:
>Bob....
>
>In your article you say you expect "dramatic improvements to PC-NFS networks"...
>Why doesn't Prestoserve speed-up NFS networks in general (i.e. what about
>NFS networks where the clients are other Sun workstations, not PCs)????

Bob is away from his desk for this week, so I'll respond to your
question.

Prestoserve most definitely does "speed-up NFS networks in general".
Bob's point was that it can be even *more* dramatic when used with
PC-NFS clients using small transfer sizes.

For example, a beta site measured a 600% performance increase after
installing on Prestoserve on a Sun serving PC-NFS clients.  Our
simulations show a 50% to 300% improvement using Prestoserve with an
NFS operations mix that was taken from a software development mix for a
server with about a 50/50 mix of diskless and diskful clients running
SunOS 4.0 (34% lookup, 22% read, 15% write, 13% getattr, 2% create).
Your mileage will vary based on operations mix and server configuration
and load level.  Prestoserve shows the most dramatic improvements on
heavily loaded servers with file systems that are accessed for both
reading and writing.

Joseph Moran
Legato Systems Inc.
260 Sheridan Avenue
Palo Alto, CA  94306
(415) 329-7886
mojo@legato.com or {sun,uunet}!legato!mojo