From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Thoughts on using SSD Date: Thu, 26 Mar 2009 19:09:01 -0400 Message-ID: <49CC0B0D.5000904@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: Linux RAID List-Id: linux-raid.ids I'm building a fairly aggressive machine for both a backup host for virtual machines and spare time development platform, compile engine and testbed both. I want to get cost effective use from an SSD unit, and I propose to use a 32GB unit as follows: for the root filesystem, 12GB, which should hold all the usual root things, and 16GB for swap (12GB RAM, and I want boot and/or hibernate to happen NOW). The remaining space I think might be used for various high impact things, and one of those with speeding raid. If I were to create a small raid device, raid1, made of the 4GB Ssd and 4GB of SATA space, if I made the SATA write-mostly and write-behind, and put the journal for my raid arrays (and bitmaps?) that seems likely to provide a significant performance gain in small storage. Am I missing anything here? Is there an obvious drawback I'm missing? -- bill davidsen CTO TMR Associates, Inc "You are disgraced professional losers. And by the way, give us our money back." - Representative Earl Pomeroy, Democrat of North Dakota on the A.I.G. executives who were paid bonuses after a federal bailout.