From owner-freebsd-questions@FreeBSD.ORG Wed May 27 05:50:21 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 49DB7106564A for ; Wed, 27 May 2009 05:50:21 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from smtp.infracaninophile.co.uk (gate6.infracaninophile.co.uk [IPv6:2001:8b0:151:1::1]) by mx1.freebsd.org (Postfix) with ESMTP id B98B78FC12 for ; Wed, 27 May 2009 05:50:20 +0000 (UTC) (envelope-from m.seaman@infracaninophile.co.uk) Received: from happy-idiot-talk.infracaninophile.co.uk (localhost [IPv6:::1]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.3/8.14.3) with ESMTP id n4R5oBNN014512; Wed, 27 May 2009 06:50:12 +0100 (BST) (envelope-from m.seaman@infracaninophile.co.uk) X-DKIM: Sendmail DKIM Filter v2.8.2 smtp.infracaninophile.co.uk n4R5oBNN014512 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=infracaninophile.co.uk; s=200708; t=1243403412; bh=S3XiEWLlxWikI+zL8eJDjPXj8LchMyXdWrqnW5tqjJM=; h=Message-ID:Date:From:MIME-Version:To:CC:Subject:References: In-Reply-To:Content-Type:Cc:Content-Type:Date:From:In-Reply-To: Message-ID:Mime-Version:References:To; z=Message-ID:=20<4A1CD48D.3020900@infracaninophile.co.uk>|Date:=20W ed,=2027=20May=202009=2006:50:05=20+0100|From:=20Matthew=20Seaman= 20|Organization:=20Infracaninophi le|User-Agent:=20Thunderbird=202.0.0.21=20(X11/20090420)|MIME-Vers ion:=201.0|To:=20Wojciech=20Puchar=20|CC:=20Gary=20Gatten=20,=20freebsd-questio ns@freebsd.org|Subject:=20Re:=20FreeBSD=20&=20Software=20RAID|Refe rences:=20<4A1AA3DC.5020300@network-i.net>=20<200905261238.52979.k irk@strauser.com>=20<70C0964126D66F458E688618E1CD008A0793ED91@WADP EXV0.waddell.com>=20<4A1C3725.8040509@infracaninophile.co.uk>=20|In-Rep ly-To:=20|X-Enigmail-Version:=200.95.6|Content-Type:=20multipart/signed =3B=20micalg=3Dpgp-sha256=3B=0D=0A=20protocol=3D"application/pgp-s ignature"=3B=0D=0A=20boundary=3D"------------enig6C7345295952FAF2B 6E90806"; b=ZZ2iRrha0kNNJHClRDKdWcIeRb2SPJQ26K0z6ENGldFrJYkJ3O6UaBGTwLsPHnUjk /xjPCVWZWjpG/wDFfzg1XWXguUeJXaSVahaZM1W61tnLEfjYBo54wHV0HFmZlFv8mo zDE7WD8XG9H91uiPi6CvXzGKe2R8qGOzIXJI8t3M= X-Authentication-Warning: happy-idiot-talk.infracaninophile.co.uk: Host localhost [IPv6:::1] claimed to be happy-idiot-talk.infracaninophile.co.uk Message-ID: <4A1CD48D.3020900@infracaninophile.co.uk> Date: Wed, 27 May 2009 06:50:05 +0100 From: Matthew Seaman Organization: Infracaninophile User-Agent: Thunderbird 2.0.0.21 (X11/20090420) MIME-Version: 1.0 To: Wojciech Puchar References: <4A1AA3DC.5020300@network-i.net> <200905261238.52979.kirk@strauser.com> <70C0964126D66F458E688618E1CD008A0793ED91@WADPEXV0.waddell.com> <4A1C3725.8040509@infracaninophile.co.uk> In-Reply-To: X-Enigmail-Version: 0.95.6 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------enig6C7345295952FAF2B6E90806" X-Virus-Scanned: clamav-milter 0.95.1 at happy-idiot-talk.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-3.0 required=5.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VERIFIED,NO_RELAYS autolearn=ham version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on happy-idiot-talk.infracaninophile.co.uk Cc: Gary Gatten , freebsd-questions@freebsd.org Subject: Re: FreeBSD & Software RAID X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 May 2009 05:50:22 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig6C7345295952FAF2B6E90806 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Wojciech Puchar wrote: >> You can make ZFS work on i386, but it requires very careful tuning and= =20 >> is not >> going to work brilliantly well for particularly large or high-throughp= ut >> filesystems. >=20 > you mean "high transfer" like reading/writing huge files. anyway not=20 > faster than properly configured UFS+maybe gstripe/gmirror. I mean high-throughput, as in bytes-per-second. Whether that consists of= a very large number of small files or fewer larger ones is pretty much imma= terial. =20 > for small files it's only fast when they will fit in cache, same with U= FS For any files, it's a lot faster when they can be served out of cache. T= hat's true for any filesystem. It's only when you get beyond the capacity of y= our caches that things get interesting. I really don't have any hard data on ZFS performance relative to UFS + ge= om. However my feeling is that UFS will win at small scales, but that ZFS wil= l close the gap as the scale increases, and that ZFS is the clear winner wh= en you consider things other than direct performance -- manageability, resil= ience to hardware failure or disk errors, etc. Of course, "small scale" (ie. a= bout the same size as a single drive) is hundreds of GB nowadays, and growing.= Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW --------------enig6C7345295952FAF2B6E90806 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEAREIAAYFAkoc1JMACgkQ8Mjk52CukIwCtQCdEJGze4VTIkJwPCcYR6zRGHM2 y1QAn2v7dzHaCViW2gAQFRz1KI8bbRA+ =dLDk -----END PGP SIGNATURE----- --------------enig6C7345295952FAF2B6E90806--