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From Ankit Bhatnagar <ank...@yahoo-inc.com>
Subject Re: How to increase the mapper number in my case
Date Sat, 09 Jan 2016 06:06:28 GMT
check these> mapred.max.split.size 
> mapred.min.split.size  

    On Friday, January 8, 2016 6:41 PM, Todd <bit1129@163.com> wrote:
 

 Hi,

I have Hadoop (2.6.0, pseudo distributed mode) and Hive (1.2.1) installed on my local machine.
I have a table A,its underlying file takes up 8 HDFS blocks.
When I run a query like
select count(1) from A

>From the result, I see only 1 mapper task ,I thought it should be equal to the block numbers.

How could I configure to make the mapper number to be equal to the block numbers? 

Thanks!


   
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