... or better still, set the number of reducers to zero

Milles

2008/7/21 Christian Ulrik Søttrup <[EMAIL PROTECTED]>:

> Hi,
>
> you can simply use the built in reducer that just copies the map output:
>
> conf.setReducerClass(org.apache.hadoop.mapred.lib.IdentityReducer.class);
>
> Cheers,
> Christian
>
>
> Zhou, Yunqing wrote:
>
>> I only use it to do something in parallel,but the reduce step will cost me
>> additional several days, is it possible to make hadoop do not use a reduce
>> step?
>>
>> Thanks
>>
>>
>>
>
>


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