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From "cheng xu" <cheng.a...@intel.com>
Subject Re: Review Request 35950: HIVE-11131: Get row information on DataWritableWriter once for better writing performance
Date Wed, 08 Jul 2015 00:27:43 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/35950/#review90838
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Ship it!


Ship It!

- cheng xu


On July 8, 2015, 12:25 a.m., Sergio Pena wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/35950/
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> 
> (Updated July 8, 2015, 12:25 a.m.)
> 
> 
> Review request for hive, Ryan Blue, cheng xu, and Dong Chen.
> 
> 
> Bugs: HIVE-11131
>     https://issues.apache.org/jira/browse/HIVE-11131
> 
> 
> Repository: hive-git
> 
> 
> Description
> -------
> 
> Implemented data type writers that will be created before the first Hive row is written
to Parquet. These writers contain information about object inspectors and schema of a specific
data type, and calls the specific addXXXX() method used by Parquet for each data type.
> 
> 
> Diffs
> -----
> 
>   ql/src/java/org/apache/hadoop/hive/ql/io/parquet/write/DataWritableWriter.java c195c3ec3ddae19bf255fc2c9633f8bf4390f428

> 
> Diff: https://reviews.apache.org/r/35950/diff/
> 
> 
> Testing
> -------
> 
> Tests from TestDataWritableWriter run OK.
> 
> I run other tests with micro-becnhmarks, and I got some better results from this new
implemntation:
> 
> Using repeated rows across the file, this is the throughput increase using 1 million
records:
> 
> bigint	boolean	double	float	int	    string
> 7.598	7.491	7.488	7.588	7.53	0.270     (before)
> 10.137	11.511	10.155	10.297	10.242  0.286     (after)
> 
> Using random rows across the file, the is the throughput increase using 1 million records:
> 
> bigint	boolean	double	float	int	    string
> 5.268	7.723	4.107	4.173	4.729	0.20       (before)
> 6.236	10.466	5.944	4.749	5.234	0.22       (after)
> 
> 
> Thanks,
> 
> Sergio Pena
> 
>


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