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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6315) Decouple recording edit logs from FSDirectory
Date Mon, 09 Jun 2014 21:31:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14025773#comment-14025773
] 

Hadoop QA commented on HDFS-6315:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12649417/HDFS-6315.005.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/7061//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/7061//console

This message is automatically generated.

> Decouple recording edit logs from FSDirectory
> ---------------------------------------------
>
>                 Key: HDFS-6315
>                 URL: https://issues.apache.org/jira/browse/HDFS-6315
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Haohui Mai
>            Assignee: Haohui Mai
>         Attachments: HDFS-6315.000.patch, HDFS-6315.001.patch, HDFS-6315.002.patch, HDFS-6315.003.patch,
HDFS-6315.004.patch, HDFS-6315.005.patch
>
>
> Currently both FSNamesystem and FSDirectory record edit logs. This design requires both
FSNamesystem and FSDirectory to be tightly coupled together to implement a durable namespace.
> This jira proposes to separate the responsibility of implementing the namespace and providing
durability with edit logs. Specifically, FSDirectory implements the namespace (which should
have no edit log operations), and FSNamesystem implement durability by recording the edit
logs.



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