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[Beowulf] network filesystem

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Greg Lindahl greg.lindahl at qlogic.com
Tue Mar 6 02:33:07 PST 2007


>well, developers should be smart enough to know what FS they're using,
>and how it's intended to behave.  turning off AC is a nice option, but 
>smarter is to leave it on and not try to cause race conditions.

Just yesterday I sat quietly at a customer site while an engineer
wasted 30 minutes not understanding that the bizarre behavior he was
seeing was due to attribute caching on NFS. The guy was a CFD expert,
not a Unix expert.

Even experts can have troubles with AC, sometimes. Just Say No to AC.

-- greg




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