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Date:	Thu, 27 Dec 2007 10:50:04 +0200
From:	"saeed bishara" <>
To:	"Jeff Garzik" <>
	"NFS list" <>
Subject: Re: read-ahead in NFS server

> (linux-nfs added to cc)
> I cannot speak for the NFS server code specifically, but 32kb sounds
> like a network read (or write) data size limit.
> Are you using TCP?  Are you using NFSv4, or an older version?
I'm using NFSv3/UDP.
I found that the actual requests size was 16KB, after doing some hacks
in server&client I managed to make it 60KB, now I see better
performance, and I see that the average request size is ~130KB which
means that there is actually read-ahead. but why it's only 130KB? how
can I make it larger?
when I run local dd with bs=4K, I can see that the average IO size is
more than 300KB.
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