FAQ
Try this:
set mapred.map.tasks=28;

Zheng
From: Ryan LeCompte
Sent: Thursday, December 10, 2009 1:45 PM
To: hive-user@hadoop.apache.org
Subject: Hive not using the full mapper capacity for certain jobs

Hello all,

The cluster has a capacity of 28 concurrent mappers. It looks like on larger tables Hive will use all 28 mappers, but on a smaller table it only uses 4 mappers maximum. Any idea how to override this?

Thanks,
Ryan

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postedDec 10, '09 at 9:45p
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