From owner-freebsd-current@FreeBSD.ORG Tue Jan 30 07:57:10 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7AECE16A400 for ; Tue, 30 Jan 2007 07:57:10 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (c220-239-3-125.belrs4.nsw.optusnet.com.au [220.239.3.125]) by mx1.freebsd.org (Postfix) with ESMTP id 08E9A13C467 for ; Tue, 30 Jan 2007 07:57:09 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from turion.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by turion.vk2pj.dyndns.org (8.13.8/8.13.8) with ESMTP id l0U7v8Hv001179; Tue, 30 Jan 2007 18:57:08 +1100 (EST) (envelope-from peter@turion.vk2pj.dyndns.org) Received: (from peter@localhost) by turion.vk2pj.dyndns.org (8.13.8/8.13.8/Submit) id l0U7v8hO001178; Tue, 30 Jan 2007 18:57:08 +1100 (EST) (envelope-from peter) Date: Tue, 30 Jan 2007 18:57:08 +1100 From: Peter Jeremy To: Robert Huff Message-ID: <20070130075708.GB892@turion.vk2pj.dyndns.org> References: <20070126224352.GD927@turion.vk2pj.dyndns.org> <17854.27369.656331.328734@jerusalem.litteratus.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="zYM0uCDKw75PZbzx" Content-Disposition: inline In-Reply-To: <17854.27369.656331.328734@jerusalem.litteratus.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.13 (2006-08-11) Cc: freebsd-current@freebsd.org Subject: Re: Interesting speed benchmarks X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jan 2007 07:57:10 -0000 --zYM0uCDKw75PZbzx Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, 2007-Jan-29 16:45:13 -0500, Robert Huff wrote: >huff@>>dump 0 -D /tmp/DF -Lau -f /dev/null /usr >& /tmp/null_dump I'd drop the '-u' and '-D' and add a '-C'. When sizing the cache, take into account that each dump subprocess (typically around 5) will allocate that much RAM. >huff@>>cat /tmp/null_dump =2E.. > DUMP: DUMP: 27485576 tape blocks on 1 volume > DUMP: finished in 13818 seconds, throughput 1989 KBytes/sec That is not good. Presumably the dmesg output looks sane (ie it's not running narrow SCSI-1) and dd (or similar) report decent thruput. Can you provide some more details on the FS? What are the block and frag sizes and how many inodes are used? --=20 Peter Jeremy --zYM0uCDKw75PZbzx Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFFvvpT/opHv/APuIcRAmj/AJ9qz6VFBkeiiNJqMClyBBqWYGxMQwCgsjhg fsAXVq8oVWKk3rVgyTuudao= =ZpKE -----END PGP SIGNATURE----- --zYM0uCDKw75PZbzx--