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From "Namit Jain (JIRA)" <>
Subject [jira] Commented: (HIVE-396) Hive performance benchmarks
Date Mon, 10 Aug 2009 22:03:14 GMT


Namit Jain commented on HIVE-396:

> I looked in hive-default.xml and didn't see any hive.merge.mapfiles. Should I add it
to hive-defult.xml and set it to false?


> Out of curiosity, why do you default to merging map files first?

There are production map-only jobs which lead to a lot of small files for many partitions,
which increases the load on the name node, and too many mappers for processing the data across
many partitions.

> Hive performance benchmarks
> ---------------------------
>                 Key: HIVE-396
>                 URL:
>             Project: Hadoop Hive
>          Issue Type: New Feature
>            Reporter: Zheng Shao
>            Assignee: Yuntao Jia
>         Attachments: AlansMRcode.tgz, hive_benchmark_2009-06-18.pdf, hive_benchmark_2009-06-18.tar.gz,
hive_benchmark_2009-07-12.pdf, hive_benchmark_2009-07-21.tar.gz
> We need some performance benchmark to measure and track the performance improvements
of Hive.
> Some references:
> PIG performance benchmarks PIG-200
> PigMix:

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