From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Subject: Re: Optimize RAID0 for max IOPS? Date: Wed, 19 Jan 2011 08:11:38 +0100 Message-ID: <20110119071138.7B2D02FC@gemini.denx.de> References: <20110118210112.D13A236C@gemini.denx.de> <4D361F26.3060507@stud.tu-ilmenau.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Return-path: In-reply-to: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim Cc: stefan.huebner@stud.tu-ilmenau.de, linux-raid@vger.kernel.org List-Id: linux-raid.ids Dear Roberto Spadim, In message you wrote: > maybe removing hwraid and using swraid may reduce speed (depend how > much cpu you use with hw and with sw) > what we can optimize? less I/O per seconds making as much useful > read/write data on array, how? good read/write algorithms for raid. > (for each device type, ssd, hd) but... like stefan, disks are your > bottleneck No, they are not. Run some benchmarks yourself if you don't believe me. Even a single disk drive is performing better than the hw RAID under this workload. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de WARNING: This Product Attracts Every Other Piece of Matter in the Universe, Including the Products of Other Manufacturers, with a Force Proportional to the Product of the Masses and Inversely Proportional to the Distance Between Them.