[
https://issues.apache.org/jira/browse/HIVE-396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741583#action_12741583
]
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?
YES
> 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: https://issues.apache.org/jira/browse/HIVE-396
> 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: http://wiki.apache.org/pig/PigMix
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
