From owner-freebsd-fs@FreeBSD.ORG Wed May 2 06:06:07 2007 Return-Path: X-Original-To: freebsd-fs@freebsd.org Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 33D2F16A400 for ; Wed, 2 May 2007 06:06:07 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: from web30310.mail.mud.yahoo.com (web30310.mail.mud.yahoo.com [209.191.69.72]) by mx1.freebsd.org (Postfix) with SMTP id E1A2A13C45D for ; Wed, 2 May 2007 06:06:04 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: (qmail 30947 invoked by uid 60001); 2 May 2007 06:06:04 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=CQGQSOtfRjo0PB3Fk3EORyEVHewOrLBE4BqMokGLAYFdppmBY61csyzimpRXIsjeN8Pomt0iDd8YkG2gtrggtP0wMbvBX6p44/+/zrdrHGi6BIaNgZvwHj2BTqHnzYIodGgksuEo02Xp6JNk+xsPmibaNx1kCbFiQOv0XZYSWyI=; X-YMail-OSG: m1.W_2QVM1myJ51BwEuGEVtlbom4m1_wVHsCFqf7x4G0yxpBMPgqspy3CBZWwsFUmyq7dczDWfyKO8q2nKh.MpsKWRoj9nX3YZ1HS.MmQbxhoK4nKFV5pP8S3FLtvg-- Received: from [213.54.0.160] by web30310.mail.mud.yahoo.com via HTTP; Tue, 01 May 2007 23:06:04 PDT Date: Tue, 1 May 2007 23:06:04 -0700 (PDT) From: Arne "Wörner" To: Francisco Reyes In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <75116.30487.qm@web30310.mail.mud.yahoo.com> Cc: freebsd-fs@freebsd.org Subject: Re: distributed filesystems 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: Wed, 02 May 2007 06:06:07 -0000 --- Francisco Reyes wrote: > Greg Troxel writes: > > Coda (http://www.coda.cs.cmu.edu/) works well on NetBSD-current, in > > which I just fixed the kernel module to conform to updated/simplified > .. > > There's also arla (afs working client, and server that I'm not sure of > > the status). > >From a performance perspective would you recommend Coda or Arla? > > Are distributed filesystems fast enough to handle something like a mailstore > for a busy Imap/pop3 server? > Depends... Since Imap/pop3 sounds like that services r limited in bandwidth by network bandwidth, u just have to care that the network connection between the file servers is fast enough. Then u should just have a little delay (when the data is sent a second time through the network) but no contention. Theoretically: If the fs does lazy updates (just getting a lock on another server and transfering the data later from a local mirror -- like described earlier in a change request for gmirror), it can do updates as fast as it can transfer data to the other server. Reading should be a lot faster, if the write-locks r handled intelligently. -Arne __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com