From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <04f8bb6e3856172ac18045959432989d@vitanuova.com> To: 9fans@cse.psu.edu Subject: Re: [9fans] kfs performance From: C H Forsyth In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="upas-ugfihjbxvofecckedihahwstve" Date: Wed, 3 Mar 2004 19:28:39 +0000 Topicbox-Message-UUID: 10e8103a-eacd-11e9-9e20-41e7f4b1d025 This is a multi-part message in MIME format. --upas-ugfihjbxvofecckedihahwstve Content-Disposition: inline Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit direct and indirect block pointers count as Bimm metadata to kfs, so those writes are synchronous and as slow as the device. --upas-ugfihjbxvofecckedihahwstve Content-Type: message/rfc822 Content-Disposition: inline Received: from mail.cse.psu.edu ([130.203.4.6]) by doppio; Wed Mar 3 19:21:17 GMT 2004 Received: by mail.cse.psu.edu (CSE Mail Server, from userid 60001) id 71AD819DF2; Wed, 3 Mar 2004 14:16:16 -0500 (EST) Received: from psuvax1.cse.psu.edu (psuvax1.cse.psu.edu [130.203.4.6]) by mail.cse.psu.edu (CSE Mail Server) with ESMTP id D456219DD1; Wed, 3 Mar 2004 14:16:10 -0500 (EST) X-Original-To: 9fans@cse.psu.edu Delivered-To: 9fans@cse.psu.edu Received: by mail.cse.psu.edu (CSE Mail Server, from userid 60001) id 303EF19D7A; Wed, 3 Mar 2004 14:15:17 -0500 (EST) Received: from t40.swtch.com (24-6-182.wireless.lcs.mit.edu [18.24.6.182]) by mail.cse.psu.edu (CSE Mail Server) with ESMTP id 01D0B19CCF for <9fans@cse.psu.edu>; Wed, 3 Mar 2004 14:15:16 -0500 (EST) Received: from localhost ([127.0.0.1] helo=t40.swtch.com) by t40.swtch.com with esmtp (Exim 4.22) id 1Aybpo-000Fug-UQ for 9fans@cse.psu.edu; Wed, 03 Mar 2004 14:15:12 -0500 To: 9fans@cse.psu.edu Subject: Re: [9fans] kfs performance In-Reply-To: Your message of "Wed, 03 Mar 2004 09:48:56." <418ebcba5700419ea957ef3bf7392b19@juice.thebigchoice.com> From: "Russ Cox" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <61172.1078341308.1@t40.swtch.com> Message-Id: Sender: 9fans-admin@cse.psu.edu Errors-To: 9fans-admin@cse.psu.edu X-BeenThere: 9fans@cse.psu.edu X-Mailman-Version: 2.0.11 Precedence: bulk Reply-To: 9fans@cse.psu.edu List-Id: Fans of the OS Plan 9 from Bell Labs <9fans.cse.psu.edu> List-Archive: Date: Wed, 03 Mar 2004 14:15:08 -0500 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on psuvax1.cse.psu.edu X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-Spam-Level: > "For metadata intensive benchmarks this improves performance by more than a f > actor of two when compared to the conventional syncronous write approach" > > hget http://www.ece.cmu.edu/~ganger/papers/CSE-TR-254-95/CSE-TR-254-95.ps except that extracting a 200MB file is anything but metadata intensive. --upas-ugfihjbxvofecckedihahwstve--