From owner-freebsd-fs@FreeBSD.ORG Thu Feb 20 14:11:28 2014 Return-Path: Delivered-To: fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 1AC3A3FA for ; Thu, 20 Feb 2014 14:11:28 +0000 (UTC) Received: from mta1-filtered.netlife.no (mail.netlife.no [62.92.26.226]) by mx1.freebsd.org (Postfix) with ESMTP id CA586156A for ; Thu, 20 Feb 2014 14:11:27 +0000 (UTC) Received: from amavis3.netlife.no (unknown [10.115.1.13]) by mta1-filtered.netlife.no (Postfix) with ESMTP id 293AD3125ED; Thu, 20 Feb 2014 15:02:29 +0100 (CET) X-Virus-Scanned: amavisd-new at netlife.no Received: from mta1-submission.netlife.no ([62.92.26.226]) by amavis3.netlife.no (amavis3.netlife.no [10.115.1.13]) (amavisd-new, port 10026) with ESMTP id s7L6DG0e6WmH; Thu, 20 Feb 2014 14:02:29 +0000 (UTC) Received: from [10.0.0.41] (unknown [195.1.220.218]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: erik@tefre.com) by mta1-submission.netlife.no (Postfix) with ESMTPSA id C2AE73125E6; Thu, 20 Feb 2014 15:02:28 +0100 (CET) Message-ID: <53060AF4.9070900@tefre.com> Date: Thu, 20 Feb 2014 15:02:28 +0100 From: Erik Stian Tefre User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Willem Jan Withagen , fs@freebsd.org Subject: Re: What types of SSDs to use..... References: <5305F8B0.1060308@digiware.nl> In-Reply-To: <5305F8B0.1060308@digiware.nl> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Feb 2014 14:11:28 -0000 > Hi, > > I'm looking for advise and suggestions on what SSDs to use for the > ZFS-systems I have and/or am building.... > > I know the difference between SLC en MLC , but beyond that I have not > the best experience with all the older SSD I have lingering about here. > > Most of them just "disconnect" after a while. > It could be because they have exceeded their wear level and just can not > write any more. But than that has occurred rather fast. > > So what types SSD are others using for > ZIL > cache > what is your experience with them > Intel SSDs are good. I've got some handfuls of x25-e, 320, DC S3500 and DC S3700 running in supermicro servers and none of them have ever failed or dropped out in any way. The x25-es have been hammered with database loads 24/7 since 2009 without any issues. I use DC S3500 for cache. DC S3700 is probably better for ZIL. (The 3700 has a higher write endurance HET-MLC, 10x the endurance of the S3500 I think and 4x the write IOPS.) Here's an interesting SSD stress test report by the way: http://www.extremetech.com/computing/173887-ssd-stress-testing-finds-intel-might-be-the-only-reliable-drive-manufacturer -- Erik