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- Newsgroups: comp.protocols.nfs
- Path: sparky!uunet!munnari.oz.au!mel.dit.csiro.au!mineng.dmpe.CSIRO.AU!dmssyd.syd.dms.CSIRO.AU!metro!usage!newt.phys.unsw.edu.au!mcba
- From: mcba@newt.phys.unsw.edu.au (Michael C. B. Ashley)
- Subject: NFS errors; "killed on swap error"; "illegal instruction"
- Message-ID: <1992Sep3.015551.26268@usage.csd.unsw.OZ.AU>
- Keywords: NFS errors
- Sender: news@usage.csd.unsw.OZ.AU
- Nntp-Posting-Host: newt.phys.unsw.edu.au
- Organization: University of New South Wales
- Date: Thu, 3 Sep 1992 01:55:51 GMT
- Lines: 29
-
- Hi everyone,
-
- Does anyone else have lots of read/write errors with NFS? I get several
- per day. I suspect that the problem is that the server (DECstation
- 5000/200, ULTRIX 4.2A) is very heavily loaded (~50 users typically),
- although I would have thought that this would have resulted in timeouts
- (which I also see) rather than read/write errors. Any comments?
-
- A related problem is that when a machine gets a corrupted version of
- an executable image via NFS, it still trys to run it, and also puts it
- safely away for future reference in its swap space. So that from then
- on whenever you try and run the program it bombs out with messages like
- "killed on swap error" and "illegal instruction". The only way that I
- have found to fix this is to use "touch" to update the executable on
- the server. Is there some way that Joe User can do this on the client
- machine? Better still, is there some way to convince ULTRIX not to cache
- binaries that it should know are corrupted? Even better, how can I
- isolate the source of the NFS errors?
-
- Yours as always, grateful for any help
- Michael Ashley mcba@newt.phys.unsw.edu.au
-
- P.S. I have heard that there may be some advantages in reducing the
- read/write buffer sizes for NFS from 8K down to 1K so that they
- fit in one ethernet packet. This would stop the need for packets
- to be fragmented, and may thereby reduce errors in an environment
- where the ethernet is very heavily used (ours is often up to 30%
- of max. capacity).
-
-