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Posted to user@giraph.apache.org by xuhong zhang <xu...@gmail.com> on 2014/09/22 23:18:11 UTC

The relation between the number of partitions, number of workers, number of mappers

I know that the number of mappers equals to the number of worker *
 mapred.tasktracker.map.tasks.maximum

How about the number of partitions？

Thanks

-- 
Xuhong Zhang

Re: The relation between the number of partitions, number of workers, number of mappers

Posted by Lukas Nalezenec <lu...@firma.seznam.cz>.

Hi,

Number of mappers = number of workers
Number of partitions = (multiplier * (number of workers) ^ 2 ) by default
(multiplier = 1 by default)

Lukas

On 22.9.2014 23:18, xuhong zhang wrote:
>
> I know that the number of mappers equals to the number of worker * 
>  mapred.tasktracker.map.tasks.maximum
>
> How about the number of partitions？
>
> Thanks
>
> -- 
> Xuhong Zhang