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https://issues.apache.org/jira/browse/HIVE-2202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ning Zhang reassigned HIVE-2202:
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Assignee: Tim Armstrong
> multi-thread hive io and execution
> ----------------------------------
>
> Key: HIVE-2202
> URL: https://issues.apache.org/jira/browse/HIVE-2202
> Project: Hive
> Issue Type: Improvement
> Reporter: Namit Jain
> Assignee: Tim Armstrong
>
> Multi-threading hive's IO part and execution part. For Hive's RCFile, the
> reader can be put in a separate thread, and can keep 2 blocks in memory. One
> block for current processing, and the other for next batch. Potentially this
> can be more intelligent (like determine how many threads to read depending on
> the execution speed), but this will depends on the HDFS client's
> implementation. And the writer can also put into a separate thread, this way,
> the execution will not need to block on writer.
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