From owner-freebsd-hackers Fri Nov 13 09:18:39 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id JAA03655 for freebsd-hackers-outgoing; Fri, 13 Nov 1998 09:18:39 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from dingo.cdrom.com (castles161.castles.com [208.214.165.161]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id JAA03647 for ; Fri, 13 Nov 1998 09:18:34 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost.cdrom.com [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id SAA02520; Thu, 12 Nov 1998 18:36:25 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Message-Id: <199811130236.SAA02520@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Greg Lehey cc: Mike Smith , hackers@FreeBSD.ORG Subject: Re: [Vinum] Stupid benchmark: newfsstone In-reply-to: Your message of "Fri, 13 Nov 1998 13:03:49 +1030." <19981113130349.N781@freebie.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 12 Nov 1998 18:36:24 -0800 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > If you have two drives 4.1GB and two that are 4.3GB, and you want to > > stripe them, you have to use a base size of 4.1GB and throw away 400MB. > > Either that, or you subdivide the disks into multiple partitions > > looking for the largest common submultiple. Yuck. > > That's exactly what we do, except that we don't throw away the rest: > it remains available for other plexes. 400 MB could come in handy > somewhere. You'd write: > > sd drive a length 4100m > sd drive b length 4100m > sd drive c length 4100m > sd drive d length 4100m > > What's the problem? The problem is that it's irrelevant to the matter at hand. I've just said "I want a striped volume across all of these disks". I don't want to futz around with spillage, I just want a striped volume across these disks. Sure, your config tool would put something like the above in the config file (that's what I meant by ignoring bits of the disk), but if the lossage is < 10% I wouldn't bother even emitting a warning message. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message