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 73B8B10143 for ; Thu, 12 Sep 2013 12:16:33 +0000 (UTC) Received: (qmail 96599 invoked by uid 500); 12 Sep 2013 12:16:32 -0000 Delivered-To: apmail-zookeeper-user-archive@zookeeper.apache.org Received: (qmail 96269 invoked by uid 500); 12 Sep 2013 12:16:30 -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 96259 invoked by uid 99); 12 Sep 2013 12:16:28 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 12 Sep 2013 12:16:28 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of briantarbox@gmail.com designates 209.85.217.178 as permitted sender) Received: from [209.85.217.178] (HELO mail-lb0-f178.google.com) (209.85.217.178) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 12 Sep 2013 12:16:23 +0000 Received: by mail-lb0-f178.google.com with SMTP id z5so809525lbh.37 for ; Thu, 12 Sep 2013 05:16:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=HEUj4v3pOQ+nEmnmoGeb9NNqYQyrwKd90oGQ+oWtPhc=; b=o5E/ffJ/WDxukN2oZCICThL92pZQCsc5OVqDX94PZsk8fVv6o4NkwStqZnu7GsKS+5 aP6Hl79F4+o9sExXy5Yh0ouvq0aUAVgEW80c5ktJZ4hxsfKNxOlHAg1RqfNQO2Tgq/Y5 sypkB9txKZchc6LONFI8g3wPCQCJpfJb3IVIcFMdeYP9DlB1Q+B4tOArZDPG8VWlHi4s w36Enj+Mk0QgcuFz3YA2dd40uPX53vV8RzgHs8GKwFf7JC1IvO3f4qdOP/3WKhPfKbQb ksbn01f5K2ncOYgYDRxL5HbLNXf9m66hv+RiEa2LKPch4c8EVpQxmfi2yvKMrFdEXcbR Amdw== MIME-Version: 1.0 X-Received: by 10.112.42.103 with SMTP id n7mr7182916lbl.6.1378988162364; Thu, 12 Sep 2013 05:16:02 -0700 (PDT) Received: by 10.112.154.229 with HTTP; Thu, 12 Sep 2013 05:16:02 -0700 (PDT) Date: Thu, 12 Sep 2013 08:16:02 -0400 Message-ID: Subject: using observers for failover From: Brian Tarbox To: user@zookeeper.apache.org Content-Type: multipart/alternative; boundary=001a1133659c913b7004e62eb352 X-Virus-Checked: Checked by ClamAV on apache.org --001a1133659c913b7004e62eb352 Content-Type: text/plain; charset=ISO-8859-1 We have a 3 node cluster which as I understand it means we can survive the failure of a single node. We have a 4th machine available and I'm wondering if I can run zk as an observer on that node and have it take over in the case of the failure of one of the regular nodes? If that doesn't make sense can anyone answer the more general question of how to deal with multiple node failure? Thanks, Brian Tarbox -- http://about.me/BrianTarbox --001a1133659c913b7004e62eb352--