From: Jeff Garzik <jeff@garzik.org>
To: saeed bishara <saeed.bishara@gmail.com>
Cc: linux-kernel@vger.kernel.org, NFS list <linux-nfs@vger.kernel.org>
Subject: Re: read-ahead in NFS server
Date: Wed, 26 Dec 2007 21:34:23 -0500 [thread overview]
Message-ID: <47730F2F.3080900@garzik.org> (raw)
In-Reply-To: <c70ff3ad0712260351i6583aa8dpbf16ed606a634b1f@mail.gmail.com>
saeed bishara wrote:
> Hi,
> my NFS server seems not to utilize the read-ahead feature, my exported
> dir is located on ext3 fs over sata disk. the sata controller can
> issue commands up to 1MB, also I modified the read ahead under the sys
> to 1MB. but when the client do reads in 32KB chunks (rsize), I can see
> in the server side that all IOs are ~32KB. my kernel version is
> 2.6.22.7.
> according to the nfsd code, the NFS server should utilize the
> read-ahead feature, but what should I do
> to make it work?
(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?
Jeff
next prev parent reply other threads:[~2007-12-27 2:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-26 11:51 read-ahead in NFS server saeed bishara
2007-12-27 2:34 ` Jeff Garzik [this message]
2007-12-27 8:50 ` saeed bishara
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=47730F2F.3080900@garzik.org \
--to=jeff@garzik.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=saeed.bishara@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox