From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miles Fidelman Subject: looking for good reference on storage configuration Date: Wed, 21 Oct 2015 08:00:07 -0400 Message-ID: <56277E47.9070003@meetinghouse.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; 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, Perhaps someone here might be able to point me at a reference or two on alternatives and best practices for configuring storage for a server - using a mix of SSDs and conventional drives. I'm in the process of upgrading a small cluster of 4 machines - each containing RAID arrays, with DRBD across clusters to support failover. Easy enough with a uniform collection of HDDs. But I can't get my head around how to add SSDs into the mix - what with the mismatch in access speeds and all, it would seem like one needs a more complex configuration with a level of caching between the faster and slower media. Seems like someone would have written a book, or tutorial, or case study, or conference presentation - but damned if I can find anything. Any pointers, or guidance, would be much appreciated. Thanks, Miles Fidelman -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra