MapReduce and Parallel DBMSs: Friends or Foes? – Communications of the ACMMapReduce complements DBMSs since databases are not designed for extract-transform-load tasks, a MapReduce specialty. The MapReduce7 (MR) paradigm has been hailed as a revolutionary new platform for large-scale, massively parallel data access.16 Some proponents claim the extreme scalability of MR will relegate relational database management systems (DBMS) to the status of legacy technology. At lea
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