From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miles Fidelman Subject: md RAID10 questions Date: Mon, 10 Oct 2011 17:37:03 -0400 Message-ID: <4E93657F.1090500@meetinghouse.net> 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@vger.kernel.org" List-Id: linux-raid.ids Hi Folks, As far as I can tell, md RAID10 is the greatest thing since sliced bread - mirroring and striping in one operation (more efficient disk use, better performance), avoids the RAID5/6 write hole issue, etc. - I've been having very good luck with it on two servers that I run. The thing is, I'm looking at some scaling and clustering options, and can find practically no documentation or case studies or much of any information about md RAID10 - which sort of surprises me. I'd think it would be more popular and there'd be more comparisons vis-a-vis other options. Anyway... what I'm looking at is trying to create a large storage pool, out of 16 drives, spread across 4 servers - essentially trying to create a poor man's storage cloud to support a collection of VMs that can be migrated for load leveling and failover. One thought is to expose all the drives via AoE, then combine them into one large RAID10 array - but I'm neither sure this is feasible nor how it would perform under various loads, failure conditions, etc. Thoughts, pointers, ....? Thanks, Miles Fidelman -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra