From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christer Solskogen Subject: Re: Optimal chunk size for RAID5? Date: Mon, 23 Feb 2015 02:36:18 +0100 Message-ID: References: <20150222173047.1ea65d67@natsu> <20150223085358.302830d1@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20150223085358.302830d1@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 22.02.2015 22:53, NeilBrown wrote: > There is no "Optimal" without reference to a particular work load. Or > particular hardware. > Do you know of such a reference? I mean, some stats that show type of workload / chunk size. The only one I've found is the 5 year old benchmark that was done ( http://louwrentius.com/linux-raid-level-and-chunk-size-the-benchmarks.html) - which shows that under benchmarking with dd that 64 is preferred. -- chs