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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8480) Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them
Date Tue, 23 Jun 2015 11:41:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597509#comment-14597509
] 

Hudson commented on HDFS-8480:
------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #967 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/967/])
HDFS-8480. Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve
old edit logs, instead of copying them. (Zhe Zhang via Colin P. McCabe) (cmccabe: rev 7b424f938c3c306795d574792b086d84e4f06425)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NNUpgradeUtil.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSUpgrade.java


> Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit
logs instead of copying them
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-8480
>                 URL: https://issues.apache.org/jira/browse/HDFS-8480
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>            Priority: Critical
>             Fix For: 2.7.1
>
>         Attachments: HDFS-8480.00.patch, HDFS-8480.01.patch, HDFS-8480.02.patch, HDFS-8480.03.patch
>
>
> HDFS-7929 copies existing edit logs to the storage directory of the upgraded {{NameNode}}.
This slows down the upgrade process. This JIRA aims to use hard-linking instead of per-op
copying to achieve the same goal.



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