From owner-freebsd-hackers Mon Jan 28 9:38: 5 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from srv1.cosmo-project.de (srv1.cosmo-project.de [213.83.6.106]) by hub.freebsd.org (Postfix) with ESMTP id E6E8737B400 for ; Mon, 28 Jan 2002 09:37:58 -0800 (PST) Received: (from uucp@localhost) by srv1.cosmo-project.de (8.11.6/8.11.6) with UUCP id g0SHZJM04566; Mon, 28 Jan 2002 18:35:19 +0100 (CET) (envelope-from ticso@cicely8.cicely.de) Received: from mail.cicely.de (cicely20.cicely.de [10.1.1.22]) by cicely5.cicely.de (8.12.1/8.12.1) with ESMTP id g0SHYBZ9090476; Mon, 28 Jan 2002 18:34:11 +0100 (CET)?g (envelope-from ticso@cicely8.cicely.de) Received: from cicely8.cicely.de (cicely8.cicely.de [10.1.2.10]) by mail.cicely.de (8.11.0/8.11.0) with ESMTP id g0SHYAf07062; Mon, 28 Jan 2002 18:34:10 +0100 (CET) Received: (from ticso@localhost) by cicely8.cicely.de (8.11.6/8.11.6) id g0SHYAC96401; Mon, 28 Jan 2002 18:34:10 +0100 (CET) (envelope-from ticso) Date: Mon, 28 Jan 2002 18:34:10 +0100 From: Bernd Walter To: Jason Andresen Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: vinum write spanning Message-ID: <20020128183409.D95936@cicely8.cicely.de> References: <3C556517.CED19C80@mitre.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3C556517.CED19C80@mitre.org> User-Agent: Mutt/1.3.23i X-Operating-System: FreeBSD cicely8.cicely.de 5.0-CURRENT i386 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, Jan 28, 2002 at 09:49:59AM -0500, Jason Andresen wrote: > I'm hoping there is an easy answer to this one... > > Is there some way vinum can be tickled such that it writes to all disks > in a plex at once? For instance, say I have a 6 disk RAID5 array > that I'm writing a 200MB file to. Is there some way I can make > vinum attempt to write data to all of the drive simultaniously? You can't easily increase performance in a single file access case with more disks. Especialy in the R5 case where you have several blocks depend on the same parity. > If vinum already does that I'm probably just saturating the PCI bus > and there's nothing more I can do, but it seems like I should have > a tougher time saturating the bus with 5400RPM drives... Vinum is designed for multiple file access which is a more common situation for a unix system. -- B.Walter COSMO-Project http://www.cosmo-project.de ticso@cicely.de Usergroup info@cosmo-project.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message