Date: Thu, 12 Nov 2009 13:01:45 -0600 From: "Sam Fourman Jr." <sfourman@gmail.com> To: Scott Ullrich <sullrich@gmail.com> Cc: Rick Macklem <rmacklem@uoguelph.ca>, Dan Nelson <dnelson@allantgroup.com>, Ivan Voras <ivoras@freebsd.org>, freebsd-current@freebsd.org Subject: Re: Help ZFS FreeBSD 8.0 RC2 Write performance issue Message-ID: <11167f520911121101o403751ddmb544dfaf1c61bf1e@mail.gmail.com> In-Reply-To: <d5992baf0911121048o76c1543el2b4d9de84ffb107@mail.gmail.com> References: <11167f520911111050j36dd94far667c81e6f5c18e69@mail.gmail.com> <hdf23m$b6n$1@ger.gmane.org> <20091111204903.GI89052@dan.emsphone.com> <11167f520911111326v13bb442bt36e853afbecdf834@mail.gmail.com> <9bbcef730911111352t12188bdajbca71bcf35a5beb5@mail.gmail.com> <Pine.GSO.4.63.0911121147310.9126@muncher.cs.uoguelph.ca> <11167f520911121044l74744c30u5a4d9ca008ab863c@mail.gmail.com> <d5992baf0911121048o76c1543el2b4d9de84ffb107@mail.gmail.com>
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On Thu, Nov 12, 2009 at 12:48 PM, Scott Ullrich <sullrich@gmail.com> wrote: > On Thu, Nov 12, 2009 at 1:44 PM, Sam Fourman Jr. <sfourman@gmail.com> 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
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