From owner-freebsd-geom@FreeBSD.ORG Fri Dec 29 14:40:00 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 BB19E16A416 for ; Fri, 29 Dec 2006 14:40:00 +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 4081013C459 for ; Fri, 29 Dec 2006 14:40:00 +0000 (UTC) (envelope-from gcubfg-freebsd-geom@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1H0Itk-0001kC-6o for freebsd-geom@freebsd.org; Fri, 29 Dec 2006 15:39:52 +0100 Received: from 89-172-40-174.adsl.net.t-com.hr ([89.172.40.174]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 29 Dec 2006 15:39:52 +0100 Received: from ivoras by 89-172-40-174.adsl.net.t-com.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 29 Dec 2006 15:39:52 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-geom@freebsd.org From: Ivan Voras Date: Fri, 29 Dec 2006 15:39:33 +0100 Lines: 48 Message-ID: References: <20061229142638.45844.qmail@web30315.mail.mud.yahoo.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigB20C309C7C634A324D78B72B" X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 89-172-40-174.adsl.net.t-com.hr User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) In-Reply-To: <20061229142638.45844.qmail@web30315.mail.mud.yahoo.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: Fri, 29 Dec 2006 14:40:00 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigB20C309C7C634A324D78B72B Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable R. B. Riddick wrote: > --- Ivan Voras wrote: >> Vasil Dimov wrote: >>> 17 drives: >>> dT: 0.563s w: 0.500s >>> L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name >>> 5 185 178 848 18.9 0 0 0.0 88.8| ggate1= 00 >> Ok, so ops/s is increasing but it's not conclusive. Does anyone know h= ow >> to get KB/t stats for synthetic geom devices? >> > I would say: > transaction size =3D (volume per second) / (operations per second) > E. g.: > 848KBps/(178r/s) =3D 4.76KB/op > or > 1028KBps/(116r/s) =3D 8.86KB/op Well "doh", nowadays I don't know how to calculate anymore :) Hmmm, it's strange - it's 2x lower than it should be. For 8 drives, each should do 16 KB/s but they do 8 KB/s. Maybe something's chopping the requests at 64 KB each? --------------enigB20C309C7C634A324D78B72B 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 iD8DBQFFlSirldnAQVacBcgRApn/AJ4wsi/Ot3cfgXAurLI9b+rx0D8XFACbBG12 O5D9ZDdEAq7nfGKsOIpnQAE= =4zvK -----END PGP SIGNATURE----- --------------enigB20C309C7C634A324D78B72B--