Affects Version/s: None
Fix Version/s: None
now, In Hama we use two map-reduce jobs to do 'C=alpha*B + A'.
first job is to generate a matrix B' = alpha * B
second job is to generate the result matrix C = B' + A
I think the first map-reduce job is unneccesary for we can do the constant-multiplication during Addition-MapReducing.
And we also encount the same problem during computing 'A1 + A2 + ... + An'.
we need to generate (n-1) hbase-tables for the temp results during addition. Can we just combine n-1 addition-mapreduce jobs into only a simple one?