Received: from localhost (unknown [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id C77989FB51D for ; Fri, 7 Sep 2007 15:19:07 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 89069-04 for ; Fri, 7 Sep 2007 15:18:49 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.5 Received: from skynet.simkin.ca (skynet.simkin.ca [72.51.27.117]) by postgresql.org (Postfix) with ESMTP id E94C69FB601 for ; Fri, 7 Sep 2007 15:18:59 -0300 (ADT) Received: from hal.simkin.ca (S0106000c6eb33e73.vc.shawcable.net [24.80.109.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by skynet.simkin.ca (Postfix) with ESMTP id 316364009 for ; Fri, 7 Sep 2007 11:18:44 -0700 (PDT) From: Alan Hodgson Organization: Simkin Network Consulting To: pgsql-performance@postgresql.org Subject: Re: SAN vs Internal Disks Date: Fri, 7 Sep 2007 11:18:42 -0700 User-Agent: KMail/1.9.5 References: <46E18886.7060502@aptalaska.net> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709071118.42749@hal.simkin.ca> X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200709/132 X-Sequence-Number: 26677 On Friday 07 September 2007 10:56, "Bryan Murphy" wrote: > Our database server connects to the san via iSCSI over Gig/E using > jumbo frames. File system is XFS (noatime). > > Throughput, however, kinda sucks. I just can't get the kind of > throughput to it I was hoping to get. A single Gig/E couldn't even theoretically do better than 125MB/sec, so yeah I would expect throughput sucks pretty bad. -- "A democracy is a sheep and two wolves deciding on what to have for lunch. Freedom is a well armed sheep contesting the results of the decision." -- Benjamin Franklin