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 7479917A88 for ; Tue, 21 Apr 2015 08:26:02 +0000 (UTC) Received: (qmail 32023 invoked by uid 500); 21 Apr 2015 08:26:02 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 31977 invoked by uid 500); 21 Apr 2015 08:26:02 -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 31962 invoked by uid 99); 21 Apr 2015 08:26:02 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 21 Apr 2015 08:26:02 +0000 Date: Tue, 21 Apr 2015 08:26:02 +0000 (UTC) From: "Walter Su (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-7621) Erasure Coding: update the Balancer/Mover data migration logic 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-7621?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14504588#comment-14504588 ] Walter Su commented on HDFS-7621: --------------------------------- I'm still reading the code, and thinking how to do it. By the way, I found a bug in balancer. HDFS-8204 > Erasure Coding: update the Balancer/Mover data migration logic > -------------------------------------------------------------- > > Key: HDFS-7621 > URL: https://issues.apache.org/jira/browse/HDFS-7621 > Project: Hadoop HDFS > Issue Type: Sub-task > Reporter: Jing Zhao > Assignee: Walter Su > > Currently the Balancer/Mover only considers the distribution of replicas of the same block during data migration: the migration cannot decrease the number of racks. With EC the Balancer and Mover should also take into account the distribution of blocks belonging to the same block group. -- This message was sent by Atlassian JIRA (v6.3.4#6332)