From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg Stark Subject: Re: [PERFORM] Postgres on RAID5 Date: 14 Mar 2005 15:17:11 -0500 Message-ID: <87zmx6rni0.fsf@stark.xeocode.com> References: <4231F5F2.6000509@m-cam.com> <87hdje7sjm.fsf@stark.xeocode.com> <33c6269f050314115339b6861d@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <33c6269f050314115339b6861d@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Alex Turner Cc: Greg Stark , Arshavir Grigorian , linux-raid@vger.kernel.org, pgsql-performance@postgresql.org List-Id: linux-raid.ids Alex Turner writes: > a 14 drive stripe will max out the PCI bus long before anything else, Hopefully anyone with a 14 drive stripe is using some combination of 64 bit PCI-X cards running at 66Mhz... > the only reason for a stripe this size is to get a total accessible > size up. Well, many drives also cuts average latency. So even if you have no need for more bandwidth you still benefit from a lower average response time by adding more drives. -- greg