From owner-freebsd-fs@FreeBSD.ORG Thu Apr 17 15:42:30 2008 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 70480106564A for ; Thu, 17 Apr 2008 15:42:30 +0000 (UTC) (envelope-from engywook@gmail.com) Received: from gv-out-0910.google.com (gv-out-0910.google.com [216.239.58.190]) by mx1.freebsd.org (Postfix) with ESMTP id B64238FC17 for ; Thu, 17 Apr 2008 15:42:29 +0000 (UTC) (envelope-from engywook@gmail.com) Received: by gv-out-0910.google.com with SMTP id n40so15121gve.39 for ; Thu, 17 Apr 2008 08:42:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; bh=21AKv9h6PExLwwews8FW9JBz4yowblEBmzDaim33C00=; b=L5S3IYyVIyQdNFEa6DIU0v06ktKLA7pdBuxMJaoPjKBP9ZE2QntE/PInQiyjCe1cZjWC43SZg3VIipM+ONrM/5SoK9Pr3Wvctc8zrZYFM9qGYgm4OP+ElwZxHMhjIOYDOV2rOiyGglboQNlVsRmVLgwwJvdPF2MEb1ib0R3ZSTI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:references; b=hVf+u/gBPaDwQ9ETnIEYLSQFUF8tUl6p/zYKSgZ0TlgIzp4Fd6Eb/GiHm5JXaVH+ph+IGUooLWAVLTycV0EZkiyqvtx2+ZSeebwGGAi8SnTjwTFjElQixhSl5gWs/ESZdcmZ7cMD1jWiUoyGL+xCk9k8uhNqQxz8F5VbgEGgH+s= Received: by 10.150.91.20 with SMTP id o20mr1873135ybb.24.1208446945795; Thu, 17 Apr 2008 08:42:25 -0700 (PDT) Received: by 10.151.85.17 with HTTP; Thu, 17 Apr 2008 08:42:25 -0700 (PDT) Message-ID: <24adbbc00804170842l28ca072fta081ea02ab70f3bd@mail.gmail.com> Date: Thu, 17 Apr 2008 17:42:25 +0200 From: "Daniel Andersson" To: "Joao Barros" In-Reply-To: <70e8236f0804170723i13136c11scca7a818a7ffc89b@mail.gmail.com> MIME-Version: 1.0 References: <24adbbc00804151529m2a74085ds468eaac55ba94a32@mail.gmail.com> <70e8236f0804170723i13136c11scca7a818a7ffc89b@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-fs@freebsd.org Subject: Re: Choppy performance. X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Apr 2008 15:42:30 -0000 >Turning off prefetch improved my workload (I play video from it for > >ex, no more skiped frames) > Okay, I'll try it. Guess I'll have to reboot..=D > >raidz isn't mirroring, that would be the mirror option. > >You loose one disk's storage for parity when you use raidz, and since > >you only added 2 disks to that raidz you lose 50% of your storage > >space. It has the appearance of mirroring but in fact it's not. > >Your choice of a raidz was wrong for what you really needed and you > >have to destroy the raidz pool to be able to change it. I suspected it was something like that, for the lack of a better word I used mirroring. Thanks for clearing it up for me! >Instead of using: > >zpool create yourpoolname raidz disk1 disk2 > >use: > >zpool create yourpoolname disk1 disk2 Okay, I'll try that. I guess I was a little too eager to try out ZFS and didn't read up properly. =P >Ruslan Wrote: > I have the same problem - rtorrent to hang temporarily during high load. >Today I installed additional 2 GB RAM and now I have 4Gb. With this >configuration hanging is more less but still exist (during ZFS upload data to >pool and swap use>0). >Seems, If swap not used (=0) then no any hanging. >So, More RAM - more beter. Okay. My server box's mobo only has two slots for RAM.=( A curious thing happened today with rtorrent. I had set rtorrent so that it couldn't use more than 3072MB of ram. (2048MB RAM + swap). rtorrent said it was using 2800MB but when I checked with top the swap wasn't in use at all?