From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario 'BitKoenig' Holbe Subject: Re: paralellism of device use in md Date: Wed, 18 Jan 2006 09:16:30 +0100 Message-ID: References: <20060117120927.GU7017@strugglers.net> <43CD8A73.90703@nsr500.net> Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Mario 'BitKoenig' Holbe wrote: > scheduled read-requests. Would it probably make sense to split one > single read over all mirrors that are currently idle? A I got it from the other thread - seek times :) Perhaps using some big (virtual) chunk size could do the trick? What about using chunks that big that seeking is faster than data-transfer... assuming a data rate of 50MB/s and 9ms average seek time would result in at least 500kB chunks, 14ms average seek time would result in at least 750kB chunks. However, since the blocks being read are most likely somewhat close together, it's not a typical average seek, so probably smaller chunks would also be possible. regards Mario -- Huch? 802.1q? Was sucht das denn hier? Wie kommt das ans TAGgeslicht?