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Posted to issues@hive.apache.org by "Vaibhav Gumashta (JIRA)" <ji...@apache.org> on 2019/01/30 01:06:00 UTC

[jira] [Commented] (HIVE-21164) ACID: explore how we can avoid a move step during compaction

    [ https://issues.apache.org/jira/browse/HIVE-21164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16755532#comment-16755532 ] 

Vaibhav Gumashta commented on HIVE-21164:
-----------------------------------------

Looks like this can benefit general cloud ingest use cases and not just compaction. 

> ACID: explore how we can avoid a move step during compaction
> ------------------------------------------------------------
>
>                 Key: HIVE-21164
>                 URL: https://issues.apache.org/jira/browse/HIVE-21164
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 3.1.1
>            Reporter: Vaibhav Gumashta
>            Assignee: Vaibhav Gumashta
>            Priority: Major
>
> Currently, we write compacted data to a temporary location and then move the files to a final location, which is an expensive operation on some cloud file systems. Since HIVE-20823 is already in, it can control the visibility of compacted data for the readers. Therefore, we can perhaps avoid writing data to a temporary location and directly write compacted data to the intended final path.



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