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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3463) Improve optimize job by avoiding creating empty output files on HDFS
Date Tue, 07 Aug 2018 09:54:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3463?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16571373#comment-16571373
] 

ASF subversion and git services commented on KYLIN-3463:
--------------------------------------------------------

Commit e7bacd35ea771db6ebaa2dad8d3a8994f76a78d3 in kylin's branch refs/heads/master from Zhong
[ https://gitbox.apache.org/repos/asf?p=kylin.git;h=e7bacd3 ]

KYLIN-3463 use LazyOutputFormat to prevent to create zero-sized default output for optimize
jobs

Signed-off-by: shaofengshi <shaofengshi@apache.org>


> Improve optimize job by avoiding creating empty output files on HDFS
> --------------------------------------------------------------------
>
>                 Key: KYLIN-3463
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3463
>             Project: Kylin
>          Issue Type: Improvement
>            Reporter: Zhong Yanghong
>            Assignee: Zhong Yanghong
>            Priority: Minor
>             Fix For: v2.4.1, v2.5.0
>
>         Attachments: APACHE-KYLIN-3463.patch
>
>
> For steps in an optimize job, like {{FilterRecommendCuboidDataJob}} & {{UpdateOldCuboidShardJob}},
{{MultipleOutputs}} is used to output data into different directories. Therefore, the default
output file is empty. {{LazyOutputFormat}} should be used to prevent to create zero-sized
default output.



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