From owner-freebsd-current@FreeBSD.ORG Thu Nov 12 19:01:48 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 054FB1065692; Thu, 12 Nov 2009 19:01:48 +0000 (UTC) (envelope-from sfourman@gmail.com) Received: from mail-pz0-f185.google.com (mail-pz0-f185.google.com [209.85.222.185]) by mx1.freebsd.org (Postfix) with ESMTP id 009448FC17; Thu, 12 Nov 2009 19:01:45 +0000 (UTC) Received: by pzk15 with SMTP id 15so1750962pzk.3 for ; Thu, 12 Nov 2009 11:01:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=AjMIZgdYd/rYeaMszLWnh2Nj9AA/UDnwyoow+Xk0Lfw=; b=yH6hatQgq+bIK8CeObSqmghdl4Ex7/ajRNXyUkVoxyY0FSGDq+/IytfQfOTzGqB8y0 WXzSz1GgZJgohzx5xCEVwL59Q94dhjVvbrTm0O5GRcWQUpZFKQGU4/W1wn6uq7+t0B7w 3yrBugTzBklERgaL6jqPAkxnB/GDC/b0XNwTU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=BVfarYEa+vt259TfL5SFDgwQ3VZw4tg1N/6zbMrGC6YH3j6sYXgUmp5AZknq9P1zPP t+I5pbmGvujWeos4MnIjVfDi0cJudeCFhcj15eIbckVB6NUFMViowHQszyc8kuwcEFsE uyOpZtEu+BvYh+8IZq/HOyl+EOtmvknX0oBPs= MIME-Version: 1.0 Received: by 10.142.249.19 with SMTP id w19mr379011wfh.199.1258052505654; Thu, 12 Nov 2009 11:01:45 -0800 (PST) In-Reply-To: References: <11167f520911111050j36dd94far667c81e6f5c18e69@mail.gmail.com> <20091111204903.GI89052@dan.emsphone.com> <11167f520911111326v13bb442bt36e853afbecdf834@mail.gmail.com> <9bbcef730911111352t12188bdajbca71bcf35a5beb5@mail.gmail.com> <11167f520911121044l74744c30u5a4d9ca008ab863c@mail.gmail.com> Date: Thu, 12 Nov 2009 13:01:45 -0600 Message-ID: <11167f520911121101o403751ddmb544dfaf1c61bf1e@mail.gmail.com> From: "Sam Fourman Jr." To: Scott Ullrich Content-Type: text/plain; charset=ISO-8859-1 Cc: Rick Macklem , Dan Nelson , Ivan Voras , freebsd-current@freebsd.org Subject: Re: Help ZFS FreeBSD 8.0 RC2 Write performance issue X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Nov 2009 19:01:48 -0000 On Thu, Nov 12, 2009 at 12:48 PM, Scott Ullrich wrote: > On Thu, Nov 12, 2009 at 1:44 PM, Sam Fourman Jr. wrote: >> I guess I am confused a bit. >> Why is it that sftp has better write speed than NFS? and from what I >> am hearing there isn't a good way to fox it? >> what about if I try and tweak the nfs connection paramaters. all of >> these tests were done with whatever default is. >> >> anyone have any Ideas on better client connection parameters? > > Sam, might want to take a look at my thread on freebsd-fs titled "Slow > disk write IO with ZFS / NFS". > > Scott ---paste from Slow disk write IO with ZFS / NFS -------- Failing that, Add a log device to the pool, SSD or ramdisk is ideal, but separate disk HDD spindles to your data zpool also works pretty well. ----------- is there anyway to safely have a log device on a ramdisk? I would assume not. Does anyone have a link to a how to for putting the ZFS log device on seprate disk spindles? Sam Fourman