From user-return-10302-apmail-cassandra-user-archive=cassandra.apache.org@cassandra.apache.org Thu Nov 04 00:01:11 2010 Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 79408 invoked from network); 4 Nov 2010 00:01:11 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 4 Nov 2010 00:01:11 -0000 Received: (qmail 92517 invoked by uid 500); 4 Nov 2010 00:01:40 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 92491 invoked by uid 500); 4 Nov 2010 00:01:40 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 92483 invoked by uid 99); 4 Nov 2010 00:01:40 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 04 Nov 2010 00:01:40 +0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=FREEMAIL_FROM,MIME_QP_LONG_LINE,RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of tmarthinussen@gmail.com designates 209.85.161.172 as permitted sender) Received: from [209.85.161.172] (HELO mail-gx0-f172.google.com) (209.85.161.172) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 04 Nov 2010 00:01:32 +0000 Received: by gxk7 with SMTP id 7so987463gxk.31 for ; Wed, 03 Nov 2010 17:01:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:subject:references:from :content-type:x-mailer:in-reply-to:message-id:date:to :content-transfer-encoding:mime-version; bh=nx2AncNgMLSXJr0yyo/x2ogaeASRU2fUuXi3X1azQxw=; b=rKqvQsBkSxBCXDBMcBoOR5EL34KphDgQPED2g//tZebL9bcld+XGdSMZzhJP4GPz99 iIyNufl79AJIM5barDLTLshNcfk6wop6eRlXFRllazt6X/22KUaCknPHmtqNfTaEFJdw hYvF/rtSwHL+Y1hpVx2Tp/E7Tw3iiQLxQ3XZ8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:references:from:content-type:x-mailer:in-reply-to :message-id:date:to:content-transfer-encoding:mime-version; b=tXvkLPS1LmzJaORQQ4jsxLyd673VN4JR2eBS4udTe54HRHugOnDAPedP/thFwWQXAw rkAcZYO/yrWjJ6ce4RAts+kJ5tJCxRSC7ivOiCZZa2Bs+FEIcpaEYhRR1f4LM42vKuO7 gK4FpzpSQtahSsoXSXmudIwo3kQ9vCB2xHr3A= Received: by 10.151.114.1 with SMTP id r1mr110265ybm.40.1288828871948; Wed, 03 Nov 2010 17:01:11 -0700 (PDT) Received: from [126.247.14.213] (pw126247014213.7.tik.panda-world.ne.jp [126.247.14.213]) by mx.google.com with ESMTPS id q4sm982949yba.2.2010.11.03.17.01.08 (version=TLSv1/SSLv3 cipher=RC4-MD5); Wed, 03 Nov 2010 17:01:10 -0700 (PDT) Subject: Re: SSD vs. HDD References: <4CD1B8EA.3050706@pdf.com> From: Terje Marthinussen Content-Type: text/plain; charset=us-ascii X-Mailer: iPhone Mail (8B117) In-Reply-To: <4CD1B8EA.3050706@pdf.com> Message-Id: Date: Thu, 4 Nov 2010 09:00:21 +0900 To: "user@cassandra.apache.org" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (iPhone Mail 8B117) X-Virus-Checked: Checked by ClamAV on apache.org How high is high and how much data do you have (Cassandra disk usage). Regards, Terje On 4 Nov 2010, at 04:32, Alaa Zubaidi wrote: > Hi, > we have a continuous high throughput writes, read and delete, and we are t= rying to find the best hardware. > Is using SSD for Cassandra improves performance? Did any one compare SSD v= s. HDD? and any recommendations on SSDs? >=20 > Thanks, > Alaa >=20