An Abstract Description Method of Map-Reduce-Merge Using Haskell

Algorithm 7

 getPair :: Map K21 V31     –Tablet1 as input data

     → Map K22 V32     –Tablet2 as input data

     →[(KV1, KV2)]    –The task of one merger

 mergeTwoRecord :: KV1        –Record1 as input data

       → KV2      –Record2 as input data

       →Maybe KV3     –Maybe Record3 or Nothing as output data