Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 73339 invoked from network); 6 Mar 2009 15:18:36 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 6 Mar 2009 15:18:36 -0000 Received: (qmail 44788 invoked by uid 500); 6 Mar 2009 15:18:35 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 44729 invoked by uid 500); 6 Mar 2009 15:18:35 -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 44688 invoked by uid 99); 6 Mar 2009 15:18:34 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 06 Mar 2009 07:18:34 -0800 X-ASF-Spam-Status: No, hits=1.2 required=10.0 tests=SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [69.147.107.21] (HELO mrout2-b.corp.re1.yahoo.com) (69.147.107.21) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 06 Mar 2009 15:18:25 +0000 Received: from [0.0.0.0] (proxy8.corp.yahoo.com [216.145.48.13]) by mrout2-b.corp.re1.yahoo.com (8.13.8/8.13.8/y.out) with ESMTP id n26FHjjI054007 for ; Fri, 6 Mar 2009 07:17:46 -0800 (PST) DomainKey-Signature: a=rsa-sha1; s=serpent; d=yahoo-inc.com; c=nofws; q=dns; h=message-id:date:from:user-agent:mime-version:to:subject: references:in-reply-to:content-type:content-transfer-encoding; b=xPzxVTyA8XqZGhrePGGSZX+43Fu4A+Mp2WWe6tz1J3Kic4avaF/eKg+q5DYYboK4 Message-ID: <49B13E98.60608@yahoo-inc.com> Date: Fri, 06 Mar 2009 07:17:44 -0800 From: Benjamin Reed User-Agent: Thunderbird 2.0.0.19 (X11/20090103) MIME-Version: 1.0 To: "zookeeper-user@hadoop.apache.org" Subject: Re: How large an ensemble can one build with Zookeeper? References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org I realize this is discussion is over, but i did want to make one quick clarification. when we talk about ensembles, we are talking about the servers that make up the zookeeper service. we refer to the servers that use the zookeeper service as clients. we have systems here that use ensembles of five servers to provide zookeeper service to thousands of client servers without problem. ben Chad Harrington wrote: > Clearly Zookeeper can handle ensembles of a dozen or so servers. How large > an ensemble can one build with Zookeeper? 100 servers? 10,000 servers? > Are there limitations that make the system unusable at large numbers of > servers? > > Thanks, > >