From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: RE: NFS Performance Between SGI Servers and Linux Clients
Date: Fri, 23 May 2003 00:23:48 +0200
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Cc: "Trond Myklebust" <trond.myklebust@fys.uio.no>,
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To: "Lever, Charles" <Charles.Lever@netapp.com>
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>>>>> " " == Charles Lever <Lever> writes:

     > trond, isn't there a read ahead value in the client that can be
     > tweaked?  he could trim down vm_max_readahead, unless there is
     > a max_readahead[] entry for anonymous file systems.

That should partly help to trim it down unless the client is reading
from > 1 file at a time. In that case the RPC layer will still try to
issue more reads (up to MIN(16,vm_max_readahead) requests per process)
if the network and server permits it.

Beware, though, that vm_max_readahead will effect not only
NFS. Performance on other tasks may suffer.

Cheers,
  Trond


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