In this case, are there counters related to map-side aggregation ?
Edson Ramiro
On Mon, Aug 8, 2016 at 4:00 PM, Edward Capriolo <edlinuxg...@gmail.com>
wrote:
> Hive uses map side aggregation instead of combiners
>
> http://dev.bizo.com/2013/02/map-side-aggregations-in-apache-hive.html
>
> On Mon, Aug 8, 2016 at 2:59 PM, Edson Ramiro <erlfi...@gmail.com> wrote:
>
>> hi all,
>>
>> I'm executing TPC-H on Hive 2.0.1, using Yarn 2.7, and I'm wondering if
>> Hive implements any Combiner by default? If so, how do I enable it?
>>
>> I am asking this because I checked the values of COMBINE_INPUT_RECORDS
>> and COMBINE_OUTPUT_RECORDS and they are always zero.
>>
>> Thanks in advance,
>>
>> Edson Ramiro
>>
>
>
