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From "Jason Dere (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-4518) Counter Strike: Operation Operator
Date Tue, 12 Nov 2013 23:55:17 GMT

     [ https://issues.apache.org/jira/browse/HIVE-4518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Dere updated HIVE-4518:
-----------------------------

    Attachment: HIVE-4518.8.patch

doesn't look like pre-commit tests ran from the last patch .. uploading patch again to run
to kick off another test run.

> Counter Strike: Operation Operator
> ----------------------------------
>
>                 Key: HIVE-4518
>                 URL: https://issues.apache.org/jira/browse/HIVE-4518
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-4518.1.patch, HIVE-4518.2.patch, HIVE-4518.3.patch, HIVE-4518.4.patch,
HIVE-4518.5.patch, HIVE-4518.6.patch.txt, HIVE-4518.7.patch, HIVE-4518.8.patch
>
>
> Queries of the form:
> from foo
> insert overwrite table bar partition (p) select ...
> insert overwrite table bar partition (p) select ...
> insert overwrite table bar partition (p) select ...
> Generate a huge amount of counters. The reason is that task.progress is turned on for
dynamic partitioning queries.
> The counters not only make queries slower than necessary (up to 50%) you will also eventually
run out. That's because we're wrapping them in enum values to comply with hadoop 0.17.
> The real reason we turn task.progress on is that we need CREATED_FILES and FATAL counters
to ensure dynamic partitioning queries don't go haywire.
> The counters have counter-intuitive names like C1 through C1000 and don't seem really
useful by themselves.
> With hadoop 20+ you don't need to wrap the counters anymore, each operator can simply
create and increment counters. That should simplify the code a lot.



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