From owner-freebsd-current@FreeBSD.ORG Thu May 24 20:29:50 2012 Return-Path: Delivered-To: freebsd-current@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id C054D106564A; Thu, 24 May 2012 20:29:50 +0000 (UTC) (envelope-from prvs=1491f9024e=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) by mx1.freebsd.org (Postfix) with ESMTP id CE3608FC0A; Thu, 24 May 2012 20:29:49 +0000 (UTC) X-Spam-Processed: mail1.multiplay.co.uk, Thu, 24 May 2012 21:29:15 +0100 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on mail1.multiplay.co.uk X-Spam-Level: X-Spam-Status: No, score=-5.0 required=6.0 tests=USER_IN_WHITELIST shortcircuit=ham autolearn=disabled version=3.2.5 Received: from r2d2 ([188.220.16.49]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50019940651.msg; Thu, 24 May 2012 21:29:14 +0100 X-MDRemoteIP: 188.220.16.49 X-Return-Path: prvs=1491f9024e=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: <1694F8A162EF44C1A9EEF4943D59DD51@multiplay.co.uk> From: "Steven Hartland" To: "Matthew Seaman" , "Mark Linimon" References: <38A5BC8F-A8FB-4371-AB1D-9548F5957254@lists.zabbadoz.net> <20120523131046.GC2358@deviant.kiev.zoral.com.ua> <12410676034.20120524013853@serebryakov.spb.ru> <8D72700F5CA4461BAD1C98908689CB9E@multiplay.co.uk> <20120523220533.GA11122@lonesome.com> <4FBE92FC.5030001@FreeBSD.org> Date: Thu, 24 May 2012 21:30:17 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: Konstantin Belousov , "Bjoern A. Zeeb" , lev@FreeBSD.org, freebsd-current FreeBSD , Kirk McKusick Subject: Re: UFS+J panics on HEAD 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, 24 May 2012 20:29:50 -0000 On 24/05/2012 00:05, Mark Linimon wrote: > On Wed, May 23, 2012 at 10:58:48PM +0100, Steven Hartland wrote: >> > While it might be a shame to see FFS go by the wayside are there any >> > big reasons why you would rather stick with FFS instead of moving >> > to ZFS with all the benefits that brings? > - ZFS eats bytes for breakfast. It is completely inappropriate > for anything with less than 4GB RAM. > > - ZFS performs poorly under disk-nearly-full conditions. >> >> - ZFS is not optimal for situations where there are a lot of small, >> randomly dispersed IOs around the disk space. Like in any sort of >> RDBMS. We actually use it in very random high IOP's applications with small requests, so high standard disk's aren't even an option so SDD's all the way and we see nice performance. I can't say we've compared it to say FFS as that simply doesn't provide the management tools we needed so wasn't even considered, but its far from shabby in our environment :) Regards Steve ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.