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 5DEF2174D0 for ; Fri, 31 Oct 2014 13:20:42 +0000 (UTC) Received: (qmail 75618 invoked by uid 500); 31 Oct 2014 13:20:42 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 75577 invoked by uid 500); 31 Oct 2014 13:20:42 -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 75433 invoked by uid 99); 31 Oct 2014 13:20:42 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 31 Oct 2014 13:20:42 +0000 Date: Fri, 31 Oct 2014 13:20:42 +0000 (UTC) From: "Hudson (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-7230) Add rolling downgrade documentation 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-7230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14191792#comment-14191792 ] Hudson commented on HDFS-7230: ------------------------------ FAILURE: Integrated in Hadoop-Hdfs-trunk #1918 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1918/]) HDFS-7230. Add rolling downgrade documentation. Contributed by Tsz Wo Nicholas Sze. (jing9: rev b811212f23d25f47e4a15a0fcfb534d698a68e3b) * hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt * hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml > Add rolling downgrade documentation > ----------------------------------- > > Key: HDFS-7230 > URL: https://issues.apache.org/jira/browse/HDFS-7230 > Project: Hadoop HDFS > Issue Type: Improvement > Components: documentation > Affects Versions: 2.4.0 > Reporter: Tsz Wo Nicholas Sze > Assignee: Tsz Wo Nicholas Sze > Fix For: 2.6.0 > > Attachments: h7230_20141028.patch > > > HDFS-5535 made a lot of improvement on rolling upgrade. It also added the cluster downgrade feature. However, the downgrade described in HDFS-5535 requires cluster downtime. In this JIRA, we discuss how to do rolling downgrade, i.e. downgrade without downtime. -- This message was sent by Atlassian JIRA (v6.3.4#6332)