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MapReduce >> mail # user >> Re: What is the preferred way to pass a small number of configuration parameters to a mapper or reducer


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Re: What is the preferred way to pass a small number of configuration parameters to a mapper or reducer
If it is a small number, A seems the best way to me.

On Friday, December 28, 2012, Kshiva Kps wrote:

>
> Which one is current ..
>
>
> What is the preferred way to pass a small number of configuration
> parameters to a mapper or reducer?
>
>
>
>
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> *A.  *As key-value pairs in the jobconf object.
>
> * *
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> *B.  *As a custom input key-value pair passed to each mapper or reducer.
>
> * *
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> *C.  *Using a plain text file via the Distributedcache, which each mapper
> or reducer reads.
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> * *
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> *D.  *Through a static variable in the MapReduce driver class (i.e., the
> class that submits the MapReduce job).
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> *Answer: B*
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>