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https://issues.apache.org/jira/browse/YARN-2765?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14231518#comment-14231518
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Hudson commented on YARN-2765:
------------------------------

FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #23 (See 
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/23/])
YARN-2765. Added leveldb-based implementation for RMStateStore. Contributed by 
Jason Lowe (jianhe: rev a7fba0bc28764e0fb36c335ea60cc58079fe007f)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/LeveldbRMStateStore.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/RMStateStoreTestBase.java
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestLeveldbRMStateStore.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/pom.xml


> Add leveldb-based implementation for RMStateStore
> -------------------------------------------------
>
>                 Key: YARN-2765
>                 URL: https://issues.apache.org/jira/browse/YARN-2765
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>             Fix For: 2.7.0
>
>         Attachments: YARN-2765.patch, YARN-2765v2.patch, YARN-2765v3.patch
>
>
> It would be nice to have a leveldb option to the resourcemanager recovery 
> store. Leveldb would provide some benefits over the existing filesystem store 
> such as better support for atomic operations, fewer I/O ops per state update, 
> and far fewer total files on the filesystem.



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