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https://issues.apache.org/jira/browse/MAPREDUCE-6141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14292037#comment-14292037
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Hudson commented on MAPREDUCE-6141:
-----------------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #6932 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/6932/])
MAPREDUCE-6141. History server leveldb recovery store. Contributed by Jason
Lowe (jlowe: rev 56b7ec71a69820ae12b4b9e2eb04b7368f721dbf)
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/HistoryServerLeveldbStateStoreService.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/test/java/org/apache/hadoop/mapreduce/v2/hs/TestHistoryServerLeveldbStateStoreService.java
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/pom.xml
* hadoop-mapreduce-project/CHANGES.txt
*
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common/src/main/java/org/apache/hadoop/mapreduce/v2/jobhistory/JHAdminConfig.java
> History server leveldb recovery store
> -------------------------------------
>
> Key: MAPREDUCE-6141
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6141
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: jobhistoryserver
> Reporter: Jason Lowe
> Assignee: Jason Lowe
> Fix For: 2.7.0
>
> Attachments: MAPREDUCE-6141.patch, MAPREDUCE-6141v2.patch,
> MAPREDUCE-6141v2.patch
>
>
> It would be nice to have a leveldb option to the job history server 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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