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- Path: 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
- Lines: 18
- NNTP-Posting-Host: elmer.wrq.com
-
- 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
-