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https://issues.apache.org/jira/browse/HIVE-2035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025645#comment-13025645
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jirapos...@reviews.apache.org commented on HIVE-2035:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/669/
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Review request for hive, Carl Steinbach, John Sichi, and Paul Yang.
Summary
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See HIVE-2135
This addresses bug HIVE-2035.
https://issues.apache.org/jira/browse/HIVE-2035
Diffs
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trunk/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java
1096976
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreCommand.java
PRE-CREATION
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreUtils.java
1096976
trunk/metastore/src/java/org/apache/hadoop/hive/metastore/URLConnectionUpdater.java
PRE-CREATION
Diff: https://reviews.apache.org/r/669/diff
Testing
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Since this is a refactoring patch, no new tests are required. Ran all the tests
in metastore. All of them passed.
Thanks,
Ashutosh
> Use block-level merge for RCFile if merging intermediate results are needed
> ---------------------------------------------------------------------------
>
> Key: HIVE-2035
> URL: https://issues.apache.org/jira/browse/HIVE-2035
> Project: Hive
> Issue Type: Improvement
> Reporter: Ning Zhang
> Assignee: He Yongqiang
>
> Currently if hive.merge.mapredfiles and/or hive.merge.mapfile is set to true
> the intermediate data could be merged using an additional MapReduce job. This
> could be quite expensive if the data size is large. With HIVE-1950, merging
> can be done in the RCFile block level so that it bypasses the
> (de-)compression, (de-)serialization phases. This could improve the merge
> process significantly.
> This JIRA should handle the case where the input table is not stored in
> RCFile, but the destination table is (which requires the intermediate data
> should be stored in the same format as the destination table).
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