From: "saeed bishara" <saeed.bishara@gmail.com>
To: "Jeff Garzik" <jeff@garzik.org>
Cc: linux-kernel@vger.kernel.org, "NFS list" <linux-nfs@vger.kernel.org>
Subject: Re: read-ahead in NFS server
Date: Thu, 27 Dec 2007 10:50:04 +0200 [thread overview]
Message-ID: <c70ff3ad0712270050u134616d1q459ed073c586dcec@mail.gmail.com> (raw)
In-Reply-To: <47730F2F.3080900@garzik.org>
> (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.
yes
>
> 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.
next prev parent reply other threads:[~2007-12-27 8:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-26 11:51 saeed bishara
2007-12-27 2:34 ` Jeff Garzik
2007-12-27 8:50 ` saeed bishara [this message]
2007-12-27 11:54 ` Jeff Garzik
2007-12-27 15:00 ` saeed bishara
2007-12-27 15:07 ` Jeff Garzik
2007-12-27 15:38 ` saeed bishara
[not found] ` <E1J852H-0002K7-P1@localhost>
2007-12-28 2:33 ` Fengguang Wu
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