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Posted to issues@kylin.apache.org by "Zhong Yanghong (JIRA)" <ji...@apache.org> on 2018/07/23 06:30:00 UTC

[jira] [Created] (KYLIN-3463) Improve optimize job by avoiding creating empty output files on HDFS

Zhong Yanghong created KYLIN-3463:
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             Summary: 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


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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