From owner-freebsd-fs@FreeBSD.ORG Wed Apr 24 23:18:11 2013 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 5413DA6B for ; Wed, 24 Apr 2013 23:18:11 +0000 (UTC) (envelope-from jdc@koitsu.org) Received: from qmta12.emeryville.ca.mail.comcast.net (qmta12.emeryville.ca.mail.comcast.net [IPv6:2001:558:fe2d:44:76:96:27:227]) by mx1.freebsd.org (Postfix) with ESMTP id 381E6135C for ; Wed, 24 Apr 2013 23:18:11 +0000 (UTC) Received: from omta12.emeryville.ca.mail.comcast.net ([76.96.30.44]) by qmta12.emeryville.ca.mail.comcast.net with comcast id ToXJ1l0060x6nqcACzJ9TE; Wed, 24 Apr 2013 23:18:09 +0000 Received: from koitsu.strangled.net ([67.180.84.87]) by omta12.emeryville.ca.mail.comcast.net with comcast id TzJ81l00V1t3BNj8YzJ9j5; Wed, 24 Apr 2013 23:18:09 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id CDC4E73A33; Wed, 24 Apr 2013 16:18:08 -0700 (PDT) Date: Wed, 24 Apr 2013 16:18:08 -0700 From: Jeremy Chadwick To: "Marc G. Fournier" Subject: Re: NFS Performance issue against NetApp Message-ID: <20130424231808.GA20882@icarus.home.lan> References: <753914397.1123782.1366844549491.JavaMail.root@erie.cs.uoguelph.ca> <4E817B3C-6524-4F7F-943C-8C707BCED610@hub.org> MIME-Version: 1.0 Content-Type: text/plain; charset=unknown-8bit Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4E817B3C-6524-4F7F-943C-8C707BCED610@hub.org> User-Agent: Mutt/1.5.21 (2010-09-15) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20121106; t=1366845489; bh=xYWigz6aB89JKKsub/19F5jnK9P09wL2yF9H7C0HYVE=; h=Received:Received:Received:Date:From:To:Subject:Message-ID: MIME-Version:Content-Type; b=PMFmPE6W7U5eD1f0YhAz7Vvu9xWlglgoXgiUurIBGs0kWXpBt7krQ62gd5C7ggNeR BodLdaYbqLzqdRHN+vh9xfqyqZwjEGMr4AaAKq9sMOfctejh/08yjQ5pUhYZtlwxAY t7GoNKIokRUhG4yBRXvjejm1LX6QMTMLfUUs1hP0vqBITzdzS/661HJeL/zgQIv5B4 iTF5wLuS8N21zMPmBTCntyQl4fC32xbFUapzSmMHdtk3vWGBzqeib5xahsGjg9kCJk 5JVWVqFw1vlvgbEVNpHi239i8+iDpnBTtnPvAVCxHEpXKwfnRY3HUZwwDKiJa0sKY1 RPLo4H2T7GqWA== Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Apr 2013 23:18:11 -0000 On Wed, Apr 24, 2013 at 04:08:24PM -0700, Marc G. Fournier wrote: > > On 2013-04-24, at 16:02 , Rick Macklem wrote: > > >> > > Along with rsize,wsize you might want to try increasing readahead. The > > default is only 1. > > Stupid question on this, possibly, but are the current defaults "sane" anymore, or residual from 'the old days'? Like, I've read in many places where you should raise rsize/wsize … in what circumstances would leaving as the defaults make sense? >From what I can discern, the defaults on stable/9 (for an NFS client) are 8192 -- see sys/nfsclient/nfs.h, NFS_WSIZE and NFS_RSIZE. -- | Jeremy Chadwick jdc@koitsu.org | | UNIX Systems Administrator http://jdc.koitsu.org/ | | Mountain View, CA, US | | Making life hard for others since 1977. PGP 4BD6C0CB |