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https://issues.apache.org/jira/browse/HIVE-16260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15939970#comment-15939970
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Lefty Leverenz edited comment on HIVE-16260 at 4/30/17 6:19 AM:
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Doc note: This adds *hive.tez.min.bloom.filter.entries*,
*hive.tez.bloom.filter.factor*, and
*hive.tez.bigtable.minsize.semijoin.reduction* to HiveConf.java. They need to
be documented in the wiki.
* [Configuration Properties -- Tez |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-Tez]
Added a TODOC2.2 label.
Edit (30/Apr/17): HIVE-16553 changes the default value of
*hive.tez.bigtable.minsize.semijoin.reduction* for release 3.0.0.
was (Author: le...@hortonworks.com):
Doc note: This adds *hive.tez.min.bloom.filter.entries*,
*hive.tez.bloom.filter.factor*, and
*hive.tez.bigtable.minsize.semijoin.reduction* to HiveConf.java. They need to
be documented in the wiki.
* [Configuration Properties -- Tez |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-Tez]
Added a TODOC2.2 label.
> Remove parallel edges of semijoin with map joins.
> -------------------------------------------------
>
> Key: HIVE-16260
> URL: https://issues.apache.org/jira/browse/HIVE-16260
> Project: Hive
> Issue Type: Task
> Reporter: Deepak Jaiswal
> Assignee: Deepak Jaiswal
> Labels: TODOC2.3
> Fix For: 2.2.0
>
> Attachments: HIVE-16260.1.patch, HIVE-16260.2.patch,
> HIVE-16260.3.patch, HIVE-16260.4.patch, HIVE-16260.5.patch
>
>
> Remove parallel edges of semijoin with map joins as they don't give any
> benefit to the query.
> Also, ensure that bloom filters are created to handle at least 1M entries and
> the semijoin is disabled if the big table has less than 1M rows.
> Both these features are configurable.
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