From owner-freebsd-geom@FreeBSD.ORG Thu Mar 29 09:41:46 2007 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id BAAD916A401 for ; Thu, 29 Mar 2007 09:41:46 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: from web30312.mail.mud.yahoo.com (web30312.mail.mud.yahoo.com [209.191.69.74]) by mx1.freebsd.org (Postfix) with SMTP id 6E1EA13C458 for ; Thu, 29 Mar 2007 09:41:46 +0000 (UTC) (envelope-from arne_woerner@yahoo.com) Received: (qmail 71565 invoked by uid 60001); 29 Mar 2007 09:41:45 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-ID; b=qgK3uH2asa0K+eIObx8tH7CZ0sTEJAysJfhVyZvg+olv0EasCRLNLqruFqpfVXcRyjKq2k7Qpt7myPn5lFZarV6lE9uHhL84KGydWpdzl9rRW2aGzL0maGwb1KqZfhWTJJuSTVjNLoj6lwRe6WWleo/p0sBZjtiL+L0y1f5Wqf4=; X-YMail-OSG: 6vGQVnAVM1nhXBfC4udlV7CgOI4aLHsXCm0SD6FduiDc7xzrJilxghHkl0U984RFzDno9MYVOca4WNn05cRazuM181M1WgfnoGtOEaAE4E8KeqasiwwFMfCpsKsOWQ-- Received: from [85.212.19.59] by web30312.mail.mud.yahoo.com via HTTP; Thu, 29 Mar 2007 02:41:45 PDT Date: Thu, 29 Mar 2007 02:41:45 -0700 (PDT) From: "R. B. Riddick" To: "Szabó" "Péter" , freebsd-geom@freebsd.org In-Reply-To: <005301c771e4$bb0a3900$6502a8c0@peteruj> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Message-ID: <869857.70440.qm@web30312.mail.mud.yahoo.com> Cc: Subject: Re: raid3 is slow X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Mar 2007 09:41:46 -0000 --- Szabó Péter wrote: > Array problem solved. But my problem is not the low read/write performance, > my problem is the high load. I start a single bittorrent download to the > encoded raid3 partition with 2.5MB/s speed, and the load is 2.5. > Hmm... As far as I can see it, u have the following tasks: 1. talking to the disks 2. label-related stuff 3. graid3 related stuff (splitting-up requests, XOR-ing all data) 4. gbde related stuff (encoding) 5. apllication stuff 6. network stuff You can see, how those tasks load ur CPU(-s(?)), when u use this command: top -S during this download process... The output of systat -vmstat during the download process might be quite interesting, too... You may want to do the download to another disk or to /dev/null somehow (in order to exclude the influence of graid3)... -Arne ____________________________________________________________________________________ Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. http://answers.yahoo.com/dir/?link=list&sid=396545367