From owner-freebsd-stable Mon May 27 6:36: 8 2002 Delivered-To: freebsd-stable@freebsd.org Received: from energyhq.homeip.net (213-97-200-73.uc.nombres.ttd.es [213.97.200.73]) by hub.freebsd.org (Postfix) with ESMTP id 7966237B401 for ; Mon, 27 May 2002 06:36:00 -0700 (PDT) Received: from energyhq.homeip.net (213-97-200-73.uc.nombres.ttd.es [213.97.200.73]) by energyhq.homeip.net (Postfix) with ESMTP id 42A3E3FCA0; Mon, 27 May 2002 15:35:55 +0200 (CEST) Received: (from flynn@localhost) by energyhq.homeip.net (8.12.3/8.12.3/Submit) id g4RDZqCq072686; Mon, 27 May 2002 15:35:53 +0200 (CEST) Date: Mon, 27 May 2002 15:35:52 +0200 From: Miguel Mendez To: Cy Schubert - CITS Open Systems Group Cc: Kirk Strauser , freebsd-stable@FreeBSD.ORG Subject: Re: Hardware RAID vs vinum Message-ID: <20020527153552.A72342@energyhq.homeip.net> Mail-Followup-To: Cy Schubert - CITS Open Systems Group , Kirk Strauser , freebsd-stable@FreeBSD.ORG References: <200205271302.g4RD2Nr1099239@cwsys.cwsent.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="0OAP2g/MAC+5xKAE" Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200205271302.g4RD2Nr1099239@cwsys.cwsent.com>; from Cy.Schubert@uumail.gov.bc.ca on Mon, May 27, 2002 at 06:02:23AM -0700 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG --0OAP2g/MAC+5xKAE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, May 27, 2002 at 06:02:23AM -0700, Cy Schubert - CITS Open Systems G= roup wrote: Hi, > Did we see a difference in CPU utilization? No. However ODS and VxVM=20 > run below the kernel and cannot be measured by vmstat or sar, which is=20 > different to how vinum works because it is part of the kernel. I feel curious about this. Both ODS and VxVM are just kernel modules that sit between hardware and the VFS layer if I'm not mistaken. What makes them different than vinum? I think vinum is, essentially, a Volume Manager clone, with it's own enhancements, so I'd expect a simillar behaviour of both programs. OTOH, and don't quote me on this because it's been almost 2 years since I last used VxVM, there's a way to gather cpu/system resources usage with some tools that come with Volume Manager. I agree that having hardware RAID in a box that is running a Database will improve performance noticeably. OTOH, if the box is just a NAS, you'll probably be fine with some sort of software RAID system (be it vinum/raidframe or whatever your OS uses). Sorry for getting a bit off-topic. Cheers, --=20 Miguel Mendez - flynn@energyhq.homeip.net GPG Public Key :: http://energyhq.homeip.net/files/pubkey.txt EnergyHQ :: http://www.energyhq.tk FreeBSD - The power to serve! --0OAP2g/MAC+5xKAE Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (FreeBSD) iD8DBQE88jY4nLctrNyFFPERAg6dAJ0UVL1UbnTy6U3WIBJGGCofGwcuZACghWId WpBGwb/yPKc2f0R3cz4XULo= =usUu -----END PGP SIGNATURE----- --0OAP2g/MAC+5xKAE-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message