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MapReduce >> mail # user >> max 1 mapper per node


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Re: max 1 mapper per node
We've been against these 'features' since it leads to very bad behaviour across the cluster with multiple apps/users etc.

What is your use-case i.e. what are you trying to achieve with this?

thanks,
Arun

On May 3, 2012, at 5:59 AM, Radim Kolar wrote:

> if plugin system for AM is overkill, something simpler can be made like:
>
> maximum number of mappers per node
> maximum number of reducers per node
>
> maximum percentage of non data local tasks
> maximum percentage of rack local tasks
>
> and set this in job properties.

--
Arun C. Murthy
Hortonworks Inc.
http://hortonworks.com/