From owner-freebsd-stable@FreeBSD.ORG Tue Feb 9 16:31:58 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 57D13106566B for ; Tue, 9 Feb 2010 16:31:58 +0000 (UTC) (envelope-from peter@simons-rock.edu) Received: from hedwig.simons-rock.edu (hedwig.simons-rock.edu [208.81.88.14]) by mx1.freebsd.org (Postfix) with ESMTP id 173068FC1F for ; Tue, 9 Feb 2010 16:31:57 +0000 (UTC) Received: from cesium.hyperfine.info (c2.8d.5646.static.theplanet.com [70.86.141.194]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by hedwig.simons-rock.edu (Postfix) with ESMTP id EF9F22BB346; Tue, 9 Feb 2010 11:31:56 -0500 (EST) Date: Tue, 9 Feb 2010 11:31:55 -0500 From: "Peter C. Lai" To: Tom Evans Message-ID: <20100209163155.GK4648@cesium.hyperfine.info> References: <4B6F9A8D.4050907@langille.org> <2e027be01002090451w2b4506a0ofb5ab55c647540a@mail.gmail.com> <2e027be01002090609y28be404dl1bb610d047b15f9b@mail.gmail.com> <2e027be01002090716y77213c45pb937e22151a2c238@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2e027be01002090716y77213c45pb937e22151a2c238@mail.gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: Charles Sprickman , FreeBSD Stable , Dan Langille Subject: Re: hardware for home use large storage X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Feb 2010 16:31:58 -0000 That's faster than just about anything I have at home. So you should be fine. It should be good enough to serve as primary media center storage even (for retrievals, anyway, probably a tad bit slow for live transcoding). Also does anybody know if benching dd if=/dev/zero onto a zfs volume that has compression turned on might affect what dd (which is getting what it knows from vfs/vmm) might report? On 2010-02-09 03:16:13PM +0000, Tom Evans wrote: > On Tue, Feb 9, 2010 at 3:01 PM, Dan Langille wrote: > > > > On Tue, February 9, 2010 9:09 am, Tom Evans wrote: > >> On Tue, Feb 9, 2010 at 1:45 PM, Dan Langille wrote: > >> One thing to point out about using a PM like this: you won't get > >> fantastic bandwidth out of it. For my needs (home storage server), > >> this really doesn't matter, I just want oodles of online storage, with > >> redundancy and reliability. > > > > > > A PM?  What's that? > > > > Yes, my priority is reliable storage.  Speed is secondary. > > > > What bandwidth are you getting? > > > > PM = Port Multiplier > > I'm getting disk speed, as I only have one device behind the PM > currently (just making sure it works properly :). The limits are that > the link from siis to the PM is SATA (3Gb/s, 375MB/s), and the siis > sits on a PCIe 1x bus (2Gb/s, 250 MB/s), so the bandwidth from that is > shared amongst the up-to 5 disks behind the PM. > > Writing from /dev/zero to the pool, I get around 120MB/s. Reading from > the pool, and writing to /dev/null, I get around 170 MB/s. > > Cheers > > Tom > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" -- =========================================================== Peter C. Lai | Bard College at Simon's Rock Systems Administrator | 84 Alford Rd. Information Technology Svcs. | Gt. Barrington, MA 01230 USA peter AT simons-rock.edu | (413) 528-7428 ===========================================================