From owner-freebsd-stable Fri Oct 22 0:36:12 1999 Delivered-To: freebsd-stable@freebsd.org Received: from guru.phone.net (guru.phone.net [216.240.39.120]) by hub.freebsd.org (Postfix) with SMTP id 1C9E214D07 for ; Fri, 22 Oct 1999 00:36:10 -0700 (PDT) (envelope-from mwm@phone.net) Received: (qmail 12385 invoked by uid 100); 22 Oct 1999 07:36:10 -0000 From: Mike Meyer MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <14352.5098.230532.678449@guru.phone.net> Date: Fri, 22 Oct 1999 00:36:10 -0700 (PDT) To: stable@freebsd.org Subject: Strange disk questions X-Mailer: VM 6.72 under 21.1 (patch 3) "Acadia" XEmacs Lucid Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I've been fooling with some disk performance testing with bonnie, and I threw mfs into the mix for fun. Everything but the mfs had disk had soft updates enabled - and it shows. They all had pretty much the same performance numbers for character-at-a-time writes as they did for block writes. MFS didn't. Which makes me wonder - is it possible to enable soft updates on an MFS file system? Is there any point in doing so? Second question - can vinum be configured to buy more performance, rather than making large partitions? In particular, could I buy two EIDE drives for about the cost of one SCSI drive of that size, hang them off separate EIDE controllers, and get performance closer to that of the SCSI drive? Thanx,