Return-Path: Delivered-To: apmail-incubator-cassandra-user-archive@minotaur.apache.org Received: (qmail 31104 invoked from network); 23 Feb 2010 16:34:19 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 23 Feb 2010 16:34:19 -0000 Received: (qmail 82090 invoked by uid 500); 23 Feb 2010 16:34:18 -0000 Delivered-To: apmail-incubator-cassandra-user-archive@incubator.apache.org Received: (qmail 82067 invoked by uid 500); 23 Feb 2010 16:34:18 -0000 Mailing-List: contact cassandra-user-help@incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: cassandra-user@incubator.apache.org Delivered-To: mailing list cassandra-user@incubator.apache.org Received: (qmail 82050 invoked by uid 99); 23 Feb 2010 16:34:18 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 23 Feb 2010 16:34:18 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of jbellis@gmail.com designates 74.125.82.47 as permitted sender) Received: from [74.125.82.47] (HELO mail-ww0-f47.google.com) (74.125.82.47) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 23 Feb 2010 16:34:11 +0000 Received: by wwb22 with SMTP id 22so752413wwb.6 for ; Tue, 23 Feb 2010 08:33:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :from:date:message-id:subject:to:content-type :content-transfer-encoding; bh=jk/ty24yhfUd/dceTeJHJIqSEOfLxwbrUvhvN+vRWdU=; b=kt9Nn8n7FLEkuhkLXK+iWDMAmbNLKuXsKTd0q+caoqKWw91XSmhJGxxDTWpGOTPEb5 VC6jSorYg1q8dPk1NM00DdsY8iqYO30t9EYeZyTuaOwmUd182l8XJD4TCsMHLgVAlLDO xCgBfjEu85irAsw4QTZFAOoAo7Su4G8kIILcU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type:content-transfer-encoding; b=R60R7adXVvh7eu298k+OtL8Pk2cNDYqI8xNQpfe9yo/Xu09Bl+8Nd/Jlsf+qUar6Xx n2xdwf8f1mSCg2gPfPNncrCa4GX2nl4K3zmqpuHCWl/VzC9PpgGt+7oC2aNMzMAXDOAw hEl+wx/Ia0xLNiiEmefeL735K7JmetpN6qjfg= MIME-Version: 1.0 Received: by 10.216.88.208 with SMTP id a58mr469945wef.35.1266942830301; Tue, 23 Feb 2010 08:33:50 -0800 (PST) In-Reply-To: References: <4b8376b4.0603c00a.0ba2.739f@mx.google.com> From: Jonathan Ellis Date: Tue, 23 Feb 2010 10:33:30 -0600 Message-ID: Subject: Re: problem about bootstrapping when used in huge node To: cassandra-user@incubator.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable For Michael, I think raid5 is not a bad choice: - if you're going to have multiple TB of data, using JBOD gives a pretty harsh limit to your compaction/anticompaction scenarios - he is concerned about his data set size, so so raid 1 or 10 "wastes" spa= ce - raid0 is potentially painful since you'd have to transfer a lot of data to repair every time a single disk dies -Jonathan On Tue, Feb 23, 2010 at 10:26 AM, Brandon Williams wrote= : > On Tue, Feb 23, 2010 at 7:31 AM, Jonathan Ellis wrote= : >> >> > (2)=A0=A0=A0=A0 How to use node has 12 1TB disk?? >> You should use a better filesystem than ext3. :) =A0We use xfs at racksp= ace. > > Also, don't use RAID5. =A0Let Cassandra's replication handle disk failure > scenarios instead, and supply multiple DataFileDirectory directives to > unique mount points. =A0If you must use RAID, RAID0, 1, or 10 would be be= tter. > -Brandon