From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: RE: Data coherency trouble with multiple clients,
	on2.6.14-rc5
Date: Wed, 26 Oct 2005 12:50:50 -0400
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Cc: Charles Duffy <ccd@mailcall.com.au>, nfs@lists.sourceforge.net
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To: "Lever, Charles" <Charles.Lever@netapp.com>
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on den 26.10.2005 klokka 08:27 (-0700) skreiv Lever, Charles:

> i agree that O_DIRECT is the right solution.  however, even with "noac"
> i would expect mr. duffy's workload to behave correctly most of the
> time.  sounds like he is able to make it fail very easily.

Why would you expect that?

"noac" does not turn off data caching, nor does it change the policy
that the client will not invalidate the data cache while it is holding
the file open for write.

Cheers,
  Trond



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