From owner-freebsd-current@FreeBSD.ORG Fri Dec 14 13:46:35 2007 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3FAAD16A419 for ; Fri, 14 Dec 2007 13:46:35 +0000 (UTC) (envelope-from rainer@ultra-secure.de) Received: from bsd.ultra-secure.de (bsd.ultra-secure.de [62.146.20.26]) by mx1.freebsd.org (Postfix) with ESMTP id 8E42313C45A for ; Fri, 14 Dec 2007 13:46:34 +0000 (UTC) (envelope-from rainer@ultra-secure.de) Received: (qmail 51019 invoked by uid 89); 14 Dec 2007 13:46:32 -0000 Received: by simscan 1.1.0 ppid: 51003, pid: 51015, t: 3.5539s scanners: attach: 1.1.0 clamav: 0.88.7/m:44/d:4673 spam: 3.1.7 X-Spam-Checker-Version: SpamAssassin 3.1.7 (2006-10-05) on bsd.ultra-secure.de X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.1.7 Received: from unknown (HELO ?212.71.117.70?) (rainer@ultra-secure.de@212.71.117.70) by bsd.ultra-secure.de with (DHE-RSA-AES256-SHA encrypted) SMTP; 14 Dec 2007 13:46:29 -0000 Message-ID: <47628934.6000007@ultra-secure.de> Date: Fri, 14 Dec 2007 14:46:28 +0100 From: Rainer Duffner User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.12) Gecko/20060911 SUSE/1.5.0.12-3.4 Thunderbird/1.5.0.12 Mnenhy/0.7.5.0 MIME-Version: 1.0 To: freebsd-current@freebsd.org References: <47606C09.2070209@isc.org> <47609F0A.7010805@clearchain.com> <47609FE3.8040606@barafranca.com> <4760B444.1080604@clearchain.com> <06CAC7FC-DB58-441D-A6E0-76D1D8133393@tamu.edu> <86ir31xwlu.fsf@ds4.des.no> <1197637700.1250.35.camel@herring.rabson.org> <86abodxvbd.fsf@ds4.des.no> In-Reply-To: <86abodxvbd.fsf@ds4.des.no> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: ZFS melting under postgres... 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: Fri, 14 Dec 2007 13:46:35 -0000 Dag-Erling Smørgrav wrote: > > Note that you can also get disk drives with a certain amount of NAND > flash built-in, but FreeBSD doesn't support that yet. > > They are intended for use with Vista - and have recently been found to be marginally more effective than a placebo (for Vista-performance). The speed-gains are barely distinguishable from measurement-errors... So, if the drives would help ZFS, it would be a big irony. There are companies that manufacture "pure" SSDs (www.superssd.com, www.soliddata.com) with battery-backup. Unfortunately, the price-tag of these systems is still beyond reach for normal customers. cheers, Rainer