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MapReduce >> mail # user >> Passing an Object to All Reducers


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Re: Passing an Object to All Reducers
On 05/06/2011 01:12 PM, Geoffry Roberts wrote:
> All,
>
> I need for each one of my reducers to have read access to a certain object
> or a clone thereof.  I can instantiate this object a start up.  How can I
> give my reducers a copy?

Serialize it to a string, set it as a configuration setting on the job's
configuration, then have each reducer read it from out of the config
setting, and deserialize the object.

HTH,

DR