Return-Path: Delivered-To: apmail-hadoop-zookeeper-user-archive@minotaur.apache.org Received: (qmail 6757 invoked from network); 15 Jul 2010 09:57:44 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 15 Jul 2010 09:57:44 -0000 Received: (qmail 98180 invoked by uid 500); 15 Jul 2010 09:57:44 -0000 Delivered-To: apmail-hadoop-zookeeper-user-archive@hadoop.apache.org Received: (qmail 97892 invoked by uid 500); 15 Jul 2010 09:57:41 -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 97884 invoked by uid 99); 15 Jul 2010 09:57:40 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 15 Jul 2010 09:57:40 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of maarten@vrijheid.net designates 69.64.155.201 as permitted sender) Received: from [69.64.155.201] (HELO mail-09.name-services.com) (69.64.155.201) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 15 Jul 2010 09:57:30 +0000 Received: from [10.0.1.6] ([62.195.52.198]) by mail-09.name-services.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 15 Jul 2010 02:56:48 -0700 From: Maarten Koopmans Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Subject: total # of zknodes Date: Thu, 15 Jul 2010 11:56:45 +0200 Message-Id: <47267DF4-BAC9-48C4-A601-77B151404DC0@vrijheid.net> To: zookeeper-user@hadoop.apache.org Mime-Version: 1.0 (Apple Message framework v1081) X-Mailer: Apple Mail (2.1081) X-OriginalArrivalTime: 15 Jul 2010 09:56:49.0199 (UTC) FILETIME=[0AED63F0:01CB2404] X-Sender: maarten@vrijheid.net X-Virus-Checked: Checked by ClamAV on apache.org Hi, I am mapping a filesystem to ZooKeeper, and use it for locking and = mapping a filesystem namespace to a flat data object space (like S3). So = assuming proper nesting and small ZooKeeper nodes (< 1KB), how many = nodes could a cluster with a few GBs of memory per instance = realistically hold totally? Thanks, Maarten=