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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3601) Hive as a contrib project
Date Tue, 22 Jul 2008 19:35:32 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615754#action_12615754
] 

Doug Cutting commented on HADOOP-3601:
--------------------------------------

> Another option would be to create a sandbox sub-project.
> A sandbox project that meets some bar could become a sub-project. 

What's the bar?  Releases need to be approved by the Hadoop PMC, and, more generally, the
PMC must monitor all activity in the project.  I don't see how a sandbox designation would
help oversight.

We don't need more options.  We have well-understood options that serve us well: core, contrib,
sub-projects, TLPs, etc.  We need to choose one.  The Hive folks seem happy with contrib.
 I'm willing to try that.  If it becomes a problem, we'll switch to something else.

> Hive as a contrib project
> -------------------------
>
>                 Key: HADOOP-3601
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3601
>             Project: Hadoop Core
>          Issue Type: New Feature
>    Affects Versions: 0.17.0
>            Reporter: Joydeep Sen Sarma
>            Priority: Minor
>         Attachments: HiveTutorial.pdf
>
>   Original Estimate: 1080h
>  Remaining Estimate: 1080h
>
> Hive is a data warehouse built on top of flat files (stored primarily in HDFS). It includes:
> - Data Organization into Tables with logical and hash partitioning
> - A Metastore to store metadata about Tables/Partitions etc
> - A SQL like query language over object data stored in Tables
> - DDL commands to define and load external data into tables
> Hive's query language is executed using Hadoop map-reduce as the execution engine. Queries
can use either single stage or multi-stage map-reduce. Hive has a native format for tables
- but can handle any data set (for example json/thrift/xml) using an IO library framework.
> Hive uses Antlr for query parsing, Apache JEXL for expression evaluation and may use
Apache Derby as an embedded database for MetaStore. Antlr has a BSD license and should be
compatible with Apache license.
> We are currently thinking of contributing to the 0.17 branch as a contrib project (since
that is the version under which it will get tested internally) - but looking for advice on
the best release path.

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