X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id A1B9A11F653C for ; Thu, 20 Apr 2006 15:43:27 -0300 (ADT) X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Score: 0.24 X-Spam-Level: X-Spam-Status: No, score=0.24 required=5 tests=[AWL=0.239, UNPARSEABLE_RELAY=0.001] Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 0WfKcrXUJ6O6 for ; Thu, 20 Apr 2006 15:43:23 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mir3-fs.mir3.com (mail.mir3.com [65.208.188.100]) by postgresql.org (Postfix) with ESMTP id 3587411F6538 for ; Thu, 20 Apr 2006 15:43:22 -0300 (ADT) Received: mir3-fs.mir3.com 172.16.1.11 from 172.16.2.68 172.16.2.68 via HTTP with MS-WebStorage 6.0.6249 Received: from archimedes.mirlogic.com by mir3-fs.mir3.com; 20 Apr 2006 11:43:20 -0700 Subject: Re: Hardware: HP StorageWorks MSA 1500 From: Mark Lewis To: Mikael Carneholm Cc: Pgsql performance In-Reply-To: <7F10D26ECFA1FB458B89C5B4B0D72C2B3E3F4C@sesrv12.wirelesscar.com> References: <7F10D26ECFA1FB458B89C5B4B0D72C2B3E3F4C@sesrv12.wirelesscar.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: MIR3, Inc. Date: Thu, 20 Apr 2006 11:43:20 -0700 Message-Id: <1145558600.29754.152.camel@archimedes> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-22) X-Archive-Number: 200604/465 X-Sequence-Number: 18549 Hmmm. We use an MSA 1000 with Fibre Channel interconnects. No real complaints, although I was a little bit disappointed by the RAID controller's battery-backed write cache performance; tiny random writes are only about 3 times as fast with write caching enabled as with it disabled, I had (perhaps naively) hoped for more. Sequential scans from our main DB (on a 5-pair RAID 10 set with 15k RPM drives) get roughly 80MB/sec. Getting the redundant RAID controllers to fail over correctly on Linux was a big headache and required working the tech support phone all day until we finally got to the deep guru who knew the proper undocumented incantations. -- Mark Lewis On Thu, 2006-04-20 at 20:00 +0200, Mikael Carneholm wrote: > We're going to get one for evaluation next week (equipped with dual > 2Gbit HBA:s and 2x14 disks, iirc). Anyone with experience from them, > performance wise? > > Regards, > Mikael > > ---------------------------(end of broadcast)--------------------------- > TIP 1: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to majordomo@postgresql.org so that your > message can get through to the mailing list cleanly