From owner-freebsd-geom@FreeBSD.ORG Sat Dec 30 12:05:06 2006 Return-Path: X-Original-To: freebsd-geom@freebsd.org Delivered-To: freebsd-geom@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id BD8B616A407 for ; Sat, 30 Dec 2006 12:05:06 +0000 (UTC) (envelope-from gcubfg-freebsd-geom@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 77EDD13C441 for ; Sat, 30 Dec 2006 12:05:04 +0000 (UTC) (envelope-from gcubfg-freebsd-geom@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1H0cxP-0005Zx-QW for freebsd-geom@freebsd.org; Sat, 30 Dec 2006 13:04:59 +0100 Received: from 89-172-50-199.adsl.net.t-com.hr ([89.172.50.199]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 30 Dec 2006 13:04:59 +0100 Received: from ivoras by 89-172-50-199.adsl.net.t-com.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 30 Dec 2006 13:04:59 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-geom@freebsd.org From: Ivan Voras Date: Sat, 30 Dec 2006 13:04:43 +0100 Lines: 34 Message-ID: References: <20061228171858.GA11296@qlovarnika.bg.datamax> <45960781.3040304@centtech.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigF7431A5591836E58C66B60C4" X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 89-172-50-199.adsl.net.t-com.hr User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) In-Reply-To: <45960781.3040304@centtech.com> X-Enigmail-Version: 0.94.1.2 Sender: news Subject: Re: gstripe performance scaling with many disks X-BeenThere: freebsd-geom@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: GEOM-specific discussions and implementations List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 Dec 2006 12:05:06 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF7431A5591836E58C66B60C4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Eric Anderson wrote: > Maybe this should be tried with md* devices just to remove the network > component from this mix. Network was introduced here to do bandwidth limiting so to get predictable results, but you're right - network could, at least in theory, be the issue here. I remember trying to do such a benchmark with USB sticks, which also have high latency, and getting similar scaling problems because the requests were split to small blocks. --------------enigF7431A5591836E58C66B60C4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFllXhldnAQVacBcgRArWTAJ9RJ1DOBgh+LGF9rdvozJbLDhIRjgCg46oD UxL4rl0mnEjATEmYnSmc7IQ= =8ENL -----END PGP SIGNATURE----- --------------enigF7431A5591836E58C66B60C4--