Return-Path: Delivered-To: apmail-lucene-hadoop-dev-archive@locus.apache.org Received: (qmail 9879 invoked from network); 9 Jan 2007 01:03:48 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 9 Jan 2007 01:03:48 -0000 Received: (qmail 13718 invoked by uid 500); 9 Jan 2007 01:03:55 -0000 Delivered-To: apmail-lucene-hadoop-dev-archive@lucene.apache.org Received: (qmail 13689 invoked by uid 500); 9 Jan 2007 01:03:55 -0000 Mailing-List: contact hadoop-dev-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hadoop-dev@lucene.apache.org Delivered-To: mailing list hadoop-dev@lucene.apache.org Received: (qmail 13680 invoked by uid 99); 9 Jan 2007 01:03:55 -0000 Received: from herse.apache.org (HELO herse.apache.org) (140.211.11.133) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 08 Jan 2007 17:03:55 -0800 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests= X-Spam-Check-By: apache.org Received: from [140.211.11.4] (HELO brutus.apache.org) (140.211.11.4) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 08 Jan 2007 17:03:47 -0800 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 928BE7141A3 for ; Mon, 8 Jan 2007 17:03:27 -0800 (PST) Message-ID: <29248889.1168304607567.JavaMail.jira@brutus> Date: Mon, 8 Jan 2007 17:03:27 -0800 (PST) From: "dhruba borthakur (JIRA)" To: hadoop-dev@lucene.apache.org Subject: [jira] Updated: (HADOOP-227) Namespace check pointing is not performed until the namenode restarts. In-Reply-To: <17890828.1147909205885.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HADOOP-227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] dhruba borthakur updated HADOOP-227: ------------------------------------ Attachment: periodiccheckpoint3.patch > Namespace check pointing is not performed until the namenode restarts. > ---------------------------------------------------------------------- > > Key: HADOOP-227 > URL: https://issues.apache.org/jira/browse/HADOOP-227 > Project: Hadoop > Issue Type: Bug > Components: dfs > Affects Versions: 0.2.0 > Reporter: Konstantin Shvachko > Assigned To: dhruba borthakur > Attachments: patch-async-checkpoints-0.9.0, patch-async-checkpoints-0.9.0, patch-async-checkpoints-0.9.0, periodiccheckpoint.patch, periodiccheckpoint2.patch, periodiccheckpoint3.patch > > > In current implementation when the name node starts, it reads its image file, then > the edits file, and then saves the updated image back into the image file. > The image file is never updated after that. > In order to provide the system reliability reliability the namespace information should > be check pointed periodically, and the edits file should be kept relatively small. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira