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 8751810AD8 for ; Thu, 5 Jun 2014 21:24:16 +0000 (UTC) Received: (qmail 71031 invoked by uid 500); 5 Jun 2014 21:24:16 -0000 Delivered-To: apmail-zookeeper-user-archive@zookeeper.apache.org Received: (qmail 70979 invoked by uid 500); 5 Jun 2014 21:24:16 -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 Delivered-To: moderator for user@zookeeper.apache.org Received: (qmail 42580 invoked by uid 500); 5 Jun 2014 17:43:38 -0000 Delivered-To: apmail-hadoop-zookeeper-user@hadoop.apache.org X-ASF-Spam-Status: No, hits=2.5 required=5.0 tests=FREEMAIL_ENVFROM_END_DIGIT,SPF_SOFTFAIL,URI_HEX X-Spam-Check-By: apache.org Received-SPF: softfail (nike.apache.org: transitioning domain of kapildeshpande.1988@gmail.com does not designate 216.139.236.26 as permitted sender) Date: Thu, 5 Jun 2014 10:43:11 -0700 (PDT) From: Kapil To: zookeeper-user@hadoop.apache.org Message-ID: <1401990191887-7579952.post@n2.nabble.com> Subject: Distributed Applocation using Zookeeper MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Hi, I need to design distributed application using zookeeper. This is the first time I am using Zookeeper so I am little confused with its usage. I have read that Zab protocol ensures serializability when it comes to multiple updates but I am unable to understand, if that is the case than it will automatically allow lock free implementation. So why locks are needed in first place? It will be great if some one can help here. Thanks -- View this message in context: http://zookeeper-user.578899.n2.nabble.com/Distributed-Applocation-using-Zookeeper-tp7579952.html Sent from the zookeeper-user mailing list archive at Nabble.com.