From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tim O'Donovan Subject: Re: Designing a cluster guide Date: Sun, 20 May 2012 09:56:46 +0100 Message-ID: <4FB8B1CE.1080803@icukhosting.co.uk> References: <8423c457-a8bb-4d26-a643-9573a8bb11a5@mailpro> <4FB8A3A5.5090809@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from smtp4.interdns.co.uk ([83.170.124.68]:60402 "HELO smtp4.interdns.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751609Ab2ETJDa (ORCPT ); Sun, 20 May 2012 05:03:30 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel@vger.kernel.org > - High performance Block Storage (RBD) > > Many large SATA SSDs for the storage (prbably in a RAID5 config) > stec zeusram ssd drive for the journal How do you think standard SATA disks would perform in comparison to this, and is a separate journaling device really necessary? Perhaps three servers, each with 12 x 1TB SATA disks configured in RAID10, an osd on each server and three separate mon servers. Would this be suitable for the storage backend for a small OpenStack cloud, performance wise, for instance? Regards, Tim O'Donovan