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Posted to issues@hive.apache.org by "Eugene Koifman (JIRA)" <ji...@apache.org> on 2017/08/21 20:22:00 UTC

[jira] [Commented] (HIVE-16669) Fine tune Compaction to take advantage of Acid 2.0

    [ https://issues.apache.org/jira/browse/HIVE-16669?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16135751#comment-16135751 ] 

Eugene Koifman commented on HIVE-16669:
---------------------------------------

see todo: TestAcidOnTez.testCtasTezUnion

> Fine tune Compaction to take advantage of Acid 2.0
> --------------------------------------------------
>
>                 Key: HIVE-16669
>                 URL: https://issues.apache.org/jira/browse/HIVE-16669
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>
> * There is little point using 2.0 vectorized reader since there is no operator pipeline in compaction
> * If minor compaction just concats delete_delta files together, then the 2 stage compaction should always ensure that we have a limited number of Orc readers to do the merging and current OrcRawRecordMerger should be fine
> * ...



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