Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 60C247BD4 for ; Wed, 3 Aug 2011 12:02:05 +0000 (UTC) Received: (qmail 27571 invoked by uid 500); 3 Aug 2011 12:02:02 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 27409 invoked by uid 500); 3 Aug 2011 12:01:58 -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 27398 invoked by uid 99); 3 Aug 2011 12:01:57 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 03 Aug 2011 12:01:57 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_NONE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [208.113.200.5] (HELO homiemail-a52.g.dreamhost.com) (208.113.200.5) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 03 Aug 2011 12:01:49 +0000 Received: from homiemail-a52.g.dreamhost.com (localhost [127.0.0.1]) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTP id 374526B824F for ; Wed, 3 Aug 2011 05:01:27 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; c=nofws; d=thelastpickle.com; h=content-type :mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; q=dns; s= thelastpickle.com; b=OUGskEGrooM3IRuOjM523r0FmW2MQV7FmpapnEHYRWt QKpdolYpBFvOxZ7ls8JdhXCkUIYVx4GOPUwarogpl3YxM3QLsPWrbVFsZzU2hOtb 7wQeN94UFZNWvlpM5UkgVdbPJAxXPzmyEsNsQuq5yq+8wURCLygtVCtqjxDoNbO8 = DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=thelastpickle.com; h= content-type:mime-version:subject:from:in-reply-to:date :content-transfer-encoding:message-id:references:to; s= thelastpickle.com; bh=0TfoIrf7gxekvKhgp2dqe01FDf4=; b=l2q2NVOzUZ 0P4ME+NTOWGym2IJKveQE6ZjLbMbx/aI31DWixtDtfuCwJ6eSl1mc2gxMo+KGPgJ RRHXUqieMSFCW1Pd6Kwb8tU6QyxwufHag0P81t2VsPYkX3ux9k5uVXjVv44cL9Eh T5qzy0db3CJVjCnsViBEbkvrzc85H+LnA= Received: from [192.168.0.101] (CPE-124-191-124-91.pmql1.win.bigpond.net.au [124.191.124.91]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: aaron@thelastpickle.com) by homiemail-a52.g.dreamhost.com (Postfix) with ESMTPSA id CD7536B810E for ; Wed, 3 Aug 2011 05:01:26 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1244.3) Subject: Re: If I always send the schema change requests to one particular node in the cassandra cluster. From: aaron morton In-Reply-To: <4219DBEB3D8F4510B267F71CF2669D20@gmail.com> Date: Wed, 3 Aug 2011 22:01:23 +1000 Content-Transfer-Encoding: quoted-printable Message-Id: <183D212B-3582-44BA-AEE2-B2B61B0BD2D1@thelastpickle.com> References: <4219DBEB3D8F4510B267F71CF2669D20@gmail.com> To: user@cassandra.apache.org X-Mailer: Apple Mail (2.1244.3) X-Virus-Checked: Checked by ClamAV on apache.org Yes.=20 Only run one schema change at a time, and only do it when the cluster = has converged to a single schema. The CLI checks for this.=20 What process are you following now ? Cheers ----------------- Aaron Morton Freelance Cassandra Developer @aaronmorton http://www.thelastpickle.com On 3 Aug 2011, at 16:19, Dikang Gu wrote: > Hi, >=20 > Can the schema disagreement problem be avoided? >=20 > Thanks. > --=20 > Dikang Gu > 0086 - 18611140205