Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 74856 invoked from network); 7 Oct 2010 16:14:19 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 7 Oct 2010 16:14:19 -0000 Received: (qmail 50726 invoked by uid 500); 7 Oct 2010 16:14:19 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 50698 invoked by uid 500); 7 Oct 2010 16:14:19 -0000 Mailing-List: contact zookeeper-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: zookeeper-user@hadoop.apache.org Delivered-To: mailing list zookeeper-user@hadoop.apache.org Received: (qmail 50690 invoked by uid 99); 7 Oct 2010 16:14:19 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Oct 2010 16:14:19 +0000 X-ASF-Spam-Status: No, hits=-1997.8 required=10.0 tests=ALL_TRUSTED,HTML_MESSAGE,T_RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.9] (HELO minotaur.apache.org) (140.211.11.9) by apache.org (qpsmtpd/0.29) with SMTP; Thu, 07 Oct 2010 16:14:18 +0000 Received: (qmail 74767 invoked by uid 99); 7 Oct 2010 16:13:58 -0000 Received: from localhost.apache.org (HELO mail-ww0-f48.google.com) (127.0.0.1) (smtp-auth username phunt, mechanism plain) by minotaur.apache.org (qpsmtpd/0.29) with ESMTP; Thu, 07 Oct 2010 16:13:58 +0000 Received: by wwi17 with SMTP id 17so6249wwi.29 for ; Thu, 07 Oct 2010 09:13:55 -0700 (PDT) MIME-Version: 1.0 Received: by 10.227.128.144 with SMTP id k16mr963571wbs.196.1286467879093; Thu, 07 Oct 2010 09:11:19 -0700 (PDT) Received: by 10.227.157.82 with HTTP; Thu, 7 Oct 2010 09:11:19 -0700 (PDT) In-Reply-To: References: Date: Thu, 7 Oct 2010 09:11:19 -0700 Message-ID: Subject: Re: Changing configuration From: Patrick Hunt To: zookeeper-user@hadoop.apache.org Content-Type: multipart/alternative; boundary=0016e65680f8f2c5290492092420 --0016e65680f8f2c5290492092420 Content-Type: text/plain; charset=ISO-8859-1 You probably want to do a "rolling restart", this is preferable over "restart the cluster" as the service will not go down. http://wiki.apache.org/hadoop/ZooKeeper/FAQ#A6 Patrick On Wed, Oct 6, 2010 at 9:49 PM, Avinash Lakshman wrote: > Suppose I have a 3 node ZK cluster composed of machines A, B and C. Now for > whatever reason I lose C forever and the machine needs to be replaced. How > do I handle this situation? Update the config with D in place of C and > restart the cluster? Also if I am interested in read just the ZAB portions > which packages should I be looking at? > > Cheers > A > --0016e65680f8f2c5290492092420--