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Posted to dev@hive.apache.org by "Ashutosh Chauhan (JIRA)" <ji...@apache.org> on 2013/01/14 23:20:13 UTC
[jira] [Commented] (HIVE-2846) Enhance bucketing and sorting
support in hive
[ https://issues.apache.org/jira/browse/HIVE-2846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13553200#comment-13553200 ]
Ashutosh Chauhan commented on HIVE-2846:
----------------------------------------
Namit,
1. We are tracking at HIVE-3784.
2. Do you mean we shall create a test suites for performance benchmarks of those scenarios?
3. We are tracking at HIVE-933.
I think we should close this generic ticket since there are already active discussions for 1. & 3. on respective jiras and open new jira for 2. Makes sense?
> Enhance bucketing and sorting support in hive
> ---------------------------------------------
>
> Key: HIVE-2846
> URL: https://issues.apache.org/jira/browse/HIVE-2846
> Project: Hive
> Issue Type: New Feature
> Reporter: Namit Jain
> Labels: gsoc, gsoc2012
>
> This task consists of a couple of sub-tasks.
> 1. Removing the map-join hint completely. Moving all processing to runtime. Currently, bucketed map joins and sort merge joins are completely
> driven off hints.
> 2. Create a performance suite for performance for bucketed map-joins for different scenarios: the big table has many buckets, whereas the small table has fewer buckets etc.
> 3. Infer bucketing and sorting from the user query, and store that in the metastore. This can be used for follow-up queries on those outputs.
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