From owner-freebsd-hackers Mon Nov 9 22:39:00 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id WAA17865 for freebsd-hackers-outgoing; Mon, 9 Nov 1998 22:39:00 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from dingo.cdrom.com (castles162.castles.com [208.214.165.162]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id WAA17859 for ; Mon, 9 Nov 1998 22:38:58 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.9.1/8.8.8) with ESMTP id WAA00637 for ; Mon, 9 Nov 1998 22:38:05 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Message-Id: <199811100638.WAA00637@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: hackers@FreeBSD.ORG Subject: [Vinum] Stupid benchmark: newfsstone Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 09 Nov 1998 22:38:04 -0800 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Just started playing with Vinum. Gawd Greg, this thing seriously needs a "smart" frontend to do the "simple" things. 4 x 4GB disks (2x Atlas, 2x Grand Prix) on an ncr 53c875, slapped together as a single volume. (you want to mention building filesystems in your manpages somewhere too - the '-v' option is not immediately obvious). 6:36 elapsed to newfs the 16GB volume in concatenated mode. 4:36 to newfs it in striped mode (64b stripes). There was an interesting symptom observed in striped mode, where the disks seemed to have a binarily-weighted access pattern. It will get more interesting when I add two more 9GB drives and four more 4GB units to the volume; especially as I haven't worked out if I can stripe the 9GB units separately and then concatenate their plex with the plex containing the 4GB units; my understanding is that all plexes in a volume contain copies of the same data. Can you nest plexes? Anyway, apart from one incident where I managed to get a pile of debugger calls out of Vinum (freeing already free memory - it occurred after many failed config attempts and I haven't been able to reproduce it) it hasn't let me down yet. Tomorrow I build the world on it. Thanks to Greg and the folks at Cybernet! -- \\ 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