From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe Subject: Re: Designing a cluster guide Date: Sun, 20 May 2012 10:27:10 +0200 Message-ID: <4FB8AADE.1000406@profihost.ag> References: <8423c457-a8bb-4d26-a643-9573a8bb11a5@mailpro> <4FB8A3A5.5090809@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:38728 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750858Ab2ETI1J (ORCPT ); Sun, 20 May 2012 04:27:09 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Christian Brunner Cc: Alexandre DERUMIER , ceph-devel@vger.kernel.org, Gregory Farnum Am 20.05.2012 10:19, schrieb Christian Brunner: > - Cheap Object Storage (S3): > > Many 3,5'' SATA Drives for the storage (probably in a RAID config) > A small and cheap SSD for the journal > > - Basic Block Storage (RBD): > > Many 2,5'' SATA Drives for the storage (RAID10 and/or mutliple OSDs) > Small MaxIOPS SSDs for each OSD journal > > - High performance Block Storage (RBD) > > Many large SATA SSDs for the storage (prbably in a RAID5 config) > stec zeusram ssd drive for the journal That's exactly what i thought too but then you need a seperate ceph / rbd cluster for each type. Which will result in a minimum of: 3x mon servers per type 4x osd servers per type --- so you'll need a minimum of 12x osd systems and 9x mon systems. Regards, Stefan