Return-Path: X-Original-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 008E9186DA for ; Tue, 13 Oct 2015 13:37:08 +0000 (UTC) Received: (qmail 60815 invoked by uid 500); 13 Oct 2015 13:37:07 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 60763 invoked by uid 500); 13 Oct 2015 13:37:07 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-issues@hadoop.apache.org Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 60749 invoked by uid 99); 13 Oct 2015 13:37:07 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 13 Oct 2015 13:37:07 +0000 Date: Tue, 13 Oct 2015 13:37:07 +0000 (UTC) From: "Vinayakumar B (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-6440) Support more than 2 NameNodes MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HDFS-6440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14954934#comment-14954934 ] Vinayakumar B commented on HDFS-6440: ------------------------------------- Is this support can be merged to branch-2? > Support more than 2 NameNodes > ----------------------------- > > Key: HDFS-6440 > URL: https://issues.apache.org/jira/browse/HDFS-6440 > Project: Hadoop HDFS > Issue Type: New Feature > Components: auto-failover, ha, namenode > Affects Versions: 2.4.0 > Reporter: Jesse Yates > Assignee: Jesse Yates > Fix For: 3.0.0 > > Attachments: Multiple-Standby-NameNodes_V1.pdf, hdfs-6440-cdh-4.5-full.patch, hdfs-6440-trunk-v1.patch, hdfs-6440-trunk-v1.patch, hdfs-6440-trunk-v3.patch, hdfs-6440-trunk-v4.patch, hdfs-6440-trunk-v5.patch, hdfs-6440-trunk-v6.patch, hdfs-6440-trunk-v7.patch, hdfs-6440-trunk-v8.patch, hdfs-multiple-snn-trunk-v0.patch > > > Most of the work is already done to support more than 2 NameNodes (one active, one standby). This would be the last bit to support running multiple _standby_ NameNodes; one of the standbys should be available for fail-over. > Mostly, this is a matter of updating how we parse configurations, some complexity around managing the checkpointing, and updating a whole lot of tests. -- This message was sent by Atlassian JIRA (v6.3.4#6332)