From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Dan Williams" Subject: Re: raid 5 read performance Date: Sun, 21 May 2006 10:19:07 -0700 Message-ID: References: <5d96567b0605210210wc3925ek6161f427944f8b7@mail.gmail.com> <17520.12342.245437.75779@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7BIT Return-path: In-Reply-To: <17520.12342.245437.75779@cse.unsw.edu.au> Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: Neil Brown Cc: "Raz Ben-Jehuda(caro)" , Linux RAID Mailing List List-Id: linux-raid.ids > Please read > > http://www.spinics.net/lists/raid/msg11838.html > > and ask if you have further questions. > Does this implementation also need to do delayed updates to the stripe cache? I.e. we bypass the cache and get the requester the data it needs but then schedule that data to also be copied into the cache by the work queue. The thinking being to reduce the read penalties associated with subsequent writes to the stripe. Dan