From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wido den Hollander Subject: Re: mon disk access pattern Date: Fri, 15 Jun 2012 11:51:35 +0200 Message-ID: <4FDB05A7.3080202@widodh.nl> References: <4FDACD90.2080807@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtp01.mail.pcextreme.nl ([109.72.87.137]:52335 "EHLO smtp01.mail.pcextreme.nl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756325Ab2FOJvi (ORCPT ); Fri, 15 Jun 2012 05:51:38 -0400 In-Reply-To: <4FDACD90.2080807@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe - Profihost AG Cc: "ceph-devel@vger.kernel.org" Hi, On 15-06-12 07:52, Stefan Priebe - Profihost AG wrote: > Hello list, > > i read somewhere that the mon has "special" disk access patterns - even > though it does not write much data. "special"? Where did you read that? The monitor has about 1 ~ 2GB of storage. So if your monitor has something like 4GB ~ 8GB of RAM, your kernel should cache almost all your monitor data. > > I'm using a patched debian squeeze with syncfs support (thanks to amon). > Are there any recommandations where to put the mon data? (SSD? Raid? > Which FS?) > Something like a regular disk with ext4 should be fine, but you can always put in an SSD if you want that. Wido > Greets, > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html