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Article #192

Re: NFS and RPC

#192
From: Tad Marshall
Date: Thu, 07 Jan 1993 03:05
18 lines
1347 bytes
In article <1992Dec30.155939.13344@spectrum.xerox.com> weltman@adoc.xerox.com writes:
>
>  I followed the initial discussion in this group about RPC, TCP, and
>UDP with great interest. At about the same time, a friend did a series
>of benchmarks in a network of Sparcstation 2's, to compare the file
>transfer performance using TCP sockets, NFS (write to remote-mounted
>disk), and RPC using TCP. The files were large (around 2 MB or larger).
>RPC using TCP was slightly slower than straight sockets using TCP, as
>expected. What was surprising was that it was so slow to just do a
>large write to the open file descriptor of a remote mounted file.
>
>Why is NFS so slow?

NFS is "stateless", which means that each "write" from the client side
will result in an open/write/close on the server.  The opens/closes slow
it down quite a bit over the file-transfers you were comparing it to.

-- Tad
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!uwm.edu!ogicse!news.u.washington.edu!tad
References: <1992Dec30.155939.13344@spectrum.xerox.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!uwm.edu!ogicse!news.u.washington.edu!tad
From: tad@wrq.com (Tad Marshall)
Newsgroups: comp.client-server
Subject: Re: NFS and RPC
Keywords: NFS,RPC
Message-ID: <1ig6ltINNe2d@shelley.u.washington.edu>
Date: 7 Jan 93 03:05:33 GMT
References: <1992Dec30.155939.13344@spectrum.xerox.com>
Organization: Walker Richer & Quinn, Inc., Seattle, WA
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