From owner-freebsd-questions@FreeBSD.ORG Sun Jun 8 23:16:59 2008 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 43124106566B for ; Sun, 8 Jun 2008 23:16:59 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id E86C38FC0A for ; Sun, 8 Jun 2008 23:16:58 +0000 (UTC) (envelope-from freebsd-questions@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1K5U89-0001QF-C1 for freebsd-questions@freebsd.org; Sun, 08 Jun 2008 23:16:57 +0000 Received: from 89-172-34-160.adsl.net.t-com.hr ([89.172.34.160]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 08 Jun 2008 23:16:57 +0000 Received: from ivoras by 89-172-34-160.adsl.net.t-com.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 08 Jun 2008 23:16:57 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-questions@freebsd.org From: Ivan Voras Date: Mon, 09 Jun 2008 01:16:39 +0200 Lines: 36 Message-ID: References: <1a5a68400806080604ped08ce8p120fc21107e7de81@mail.gmail.com> <20080608215648.Q9779@wojtek.tensor.gdynia.pl> <20080608230131.00003da7@westmark> <20080609001010.G59013@wojtek.tensor.gdynia.pl> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig37BC1F8E279DA9A9F22E6182" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 89-172-34-160.adsl.net.t-com.hr User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) In-Reply-To: <20080609001010.G59013@wojtek.tensor.gdynia.pl> X-Enigmail-Version: 0.95.6 Sender: news Subject: Re: FreeBSD + ZFS on a production server? 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: Sun, 08 Jun 2008 23:16:59 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig37BC1F8E279DA9A9F22E6182 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Wojciech Puchar wrote: > 2) ZFS RAID-z turns your X drives to single drive performance both on=20 > read and write. every normal RAID-5 implementation will give you random= =20 > read speed of X-1 times single drive speed, while slow random write=20 > speeds (but still at least half of single drive). but this is advertise= d=20 > as a feature Is this because of checksum verification (the need to read all=20 components) or something else? Any documentation/references? --------------enig37BC1F8E279DA9A9F22E6182 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFITGhdldnAQVacBcgRAoYZAKDtf0wMEWTffKMLzLXTzC1VGv8mlQCgj1CY u/EJF/aujs5Y0rOOuTFdYA4= =7HX/ -----END PGP SIGNATURE----- --------------enig37BC1F8E279DA9A9F22E6182--