From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id p424Vw6a208923 for ; Sun, 1 May 2011 23:31:58 -0500 Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1DA6A1EC6C89 for ; Sun, 1 May 2011 21:35:33 -0700 (PDT) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id 1wPCy2XWKpBExEpI for ; Sun, 01 May 2011 21:35:33 -0700 (PDT) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 37CA66C0F2 for ; Sun, 1 May 2011 23:35:33 -0500 (CDT) Message-ID: <4DBE3492.4060303@hardwarefreak.com> Date: Sun, 01 May 2011 23:35:30 -0500 From: Stan Hoeppner MIME-Version: 1.0 Subject: Re: op-journaled fs, journal size and storage speeds References: <19900.8703.214676.218477@tree.ty.sabi.co.UK> <20110501092758.GG13542@dastard> In-Reply-To: <20110501092758.GG13542@dastard> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: xfs@oss.sgi.com On 5/1/2011 4:27 AM, Dave Chinner wrote: > Got a supplier for the custom hardware you'd need? Just use a PCIe > SSD.... 50GB OCZ RevoDrive PCIe x4 SSD MLC NAND Dual SandForce 1200 controllers, internal RAID 0 design 70,000 write IOPS, 4KB aligned 350MB/s write sustained $200 USD at Newegg: http://www.newegg.com/Product/Product.aspx?Item=N82E16820227596 Current best value for a PCIe SSD suitable for dedicated log drive use, can fit ~22 maximum size (2GB) XFS logs. Note the MLC NAND. If all your filesystems will sustain constant high rate metadata writes, an SLC based product is more suitable, though price is 10-50x higher for PCIe SLC cards. If you want/need the 10x increase in flash cell life of SLC NAND, go with this Intel SLC SATAII SSD for ~2x the $$ of the Revo. Note it's write IOPS is 'only' 33k, size is 32GB, 18GB less. http://www.newegg.com/Product/Product.aspx?Item=N82E16820167013 -- Stan _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs