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Date: Fri, 29 Mar 2013 15:39:16 +0000 (UTC)
From: "Phabricator (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Message-ID: <JIRA.12639695.1364509722400.76841.1364571556746@arcas>
In-Reply-To: <JIRA.12639695.1364509722400@arcas>
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Subject: [jira] [Updated] (HIVE-4250) Closing lots of RecordWriters is slow
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     [ https://issues.apache.org/jira/browse/HIVE-4250?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Phabricator updated HIVE-4250:
------------------------------

    Attachment: HIVE-4250.D9807.1.patch

omalley requested code review of "HIVE-4250 [jira] Closing lots of RecordWriters is slow".

Reviewers: JIRA

add threadpool for close writers

In FileSinkOperator, all of the RecordWriters are closed sequentially. For queries with a lot of dynamic partitions this can add substantially to the task time. For one query in particular, after processing all of the records in a few minutes the reduces spend 15 minutes closing all of the RC files.

TEST PLAN
  EMPTY

REVISION DETAIL
  https://reviews.facebook.net/D9807

AFFECTED FILES
  ql/src/java/org/apache/hadoop/hive/ql/exec/FileSinkOperator.java

MANAGE HERALD RULES
  https://reviews.facebook.net/herald/view/differential/

WHY DID I GET THIS EMAIL?
  https://reviews.facebook.net/herald/transcript/23415/

To: JIRA, omalley

                
> Closing lots of RecordWriters is slow
> -------------------------------------
>
>                 Key: HIVE-4250
>                 URL: https://issues.apache.org/jira/browse/HIVE-4250
>             Project: Hive
>          Issue Type: New Feature
>          Components: Serializers/Deserializers
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>         Attachments: HIVE-4250.D9807.1.patch
>
>
> In FileSinkOperator, all of the RecordWriters are closed sequentially. For queries with a lot of dynamic partitions this can add substantially to the task time. For one query in particular, after processing all of the records in a few minutes the reduces spend 15 minutes closing all of the RC files.

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