Adding Multiple Reducers implementations.
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Key: HADOOP-5630
URL: https://issues.apache.org/jira/browse/HADOOP-5630
Project: Hadoop Core
Issue Type: New Feature
Reporter: Sidharth Gupta
Like the Patch released here https://issues.apache.org/jira/browse/HADOOP-372
can we have a multi format Reducer too. Someone suggested that if we need
different reducers and map implementations(like what i need) I was better of by
writing 2 jobs. I dont quite agree. I am calculating 2 big matrices that must
be calculated in the map step, summed in the reducers multiplied and then
written to a file. The First mapper sums a matrix based on the i,j th
index(key) into the file and the second mapper adds the N*1 dimension vector
that uses a new line as key. These keys must be passed as such to the reduce
process.
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