Return-Path: X-Original-To: apmail-zookeeper-user-archive@www.apache.org Delivered-To: apmail-zookeeper-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 310F02F4B for ; Thu, 5 May 2011 17:42:43 +0000 (UTC) Received: (qmail 34042 invoked by uid 500); 5 May 2011 17:42:42 -0000 Delivered-To: apmail-zookeeper-user-archive@zookeeper.apache.org Received: (qmail 34014 invoked by uid 500); 5 May 2011 17:42:42 -0000 Mailing-List: contact user-help@zookeeper.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@zookeeper.apache.org Delivered-To: mailing list user@zookeeper.apache.org Received: (qmail 34006 invoked by uid 500); 5 May 2011 17:42:42 -0000 Delivered-To: apmail-hadoop-zookeeper-user@hadoop.apache.org Received: (qmail 34003 invoked by uid 99); 5 May 2011 17:42:42 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 05 May 2011 17:42:42 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,RFC_ABUSE_POST,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of ted.dunning@gmail.com designates 209.85.220.176 as permitted sender) Received: from [209.85.220.176] (HELO mail-vx0-f176.google.com) (209.85.220.176) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 05 May 2011 17:42:34 +0000 Received: by vxa37 with SMTP id 37so4047171vxa.35 for ; Thu, 05 May 2011 10:42:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=HpJ5sVkKZef4egcPf5+sa0ubmgX3lOFNU0d+Pjgc3Ac=; b=BWMn2jzgr1KfS4XLZFB+tNOT+EMyTW1UpTjzfSZqL17SsI/vZ9jQFWX8FLsavPa6wr 1/5OpL+sHHQ91MCNmTWUUX7MCFp9SLUbsEj21N/mCKAWOq3TqCiXq3r4QCwsRd7ORhZN JQRfUWQ0a2kTXwV7i47QFi6rphCKMuEcrgcLA= 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 :cc:content-type; b=Jzvr+ZUMur5yxSCDpvRfFrNXCM2VcRSElgJ5gttbvrctbNeRT6M0TMCtCI01Fu8sVQ ukPL28mlOxDEmscyfaQ6jRBxP5OKl+QRVm2vLVB5xONb2TCxjmh4I5bN8wIHsN54TANf WRdxUZcxN+BpjVbtPuXpwtEZz8lqfj3iWpl9c= Received: by 10.52.184.98 with SMTP id et2mr3278495vdc.285.1304617334039; Thu, 05 May 2011 10:42:14 -0700 (PDT) MIME-Version: 1.0 Received: by 10.52.116.42 with HTTP; Thu, 5 May 2011 10:41:54 -0700 (PDT) In-Reply-To: References: <660D007A-C5E2-496B-A73E-CBE2560BB976@me.com> From: Ted Dunning Date: Thu, 5 May 2011 10:41:54 -0700 Message-ID: Subject: Re: Growing a cluster To: user@zookeeper.apache.org Cc: "zookeeper-user@hadoop.apache.org" Content-Type: multipart/alternative; boundary=bcaec548a067c3637504a28ae412 X-Virus-Checked: Checked by ClamAV on apache.org --bcaec548a067c3637504a28ae412 Content-Type: text/plain; charset=UTF-8 On Thu, May 5, 2011 at 10:12 AM, Jared Cantwell wrote: > Thanks Ted. So based on this it seems like you'd have to go from 1 to 2 > servers, and then from 2 to 3 servers, 3 to 5, 5 to 9, etc., right? > No. I would avoid even numbers. I would go 1 to 3 (but one is missing initially). Counting active servers would give the sequence you say, but the configurations would say first 1, then 3 and conceptually, you are moving from one server to three with no intermediate configuraiton. > > This is what we have designed and are testing, although it doesn't seem to > always be so smooth. Sometimes the servers seem to get "stuck" on the > restart-- we're trying to collect more details. > Even number cluster sizes are evil. --bcaec548a067c3637504a28ae412--