Greenplum is a solution built to support the next generation of data warehousing and large scale analytical processing.
Greenplum Concepts and Greenplum DBA's Routine Tasks
MapReduce is a programming model for expressing distributed computations on massive datasets and an execution framework for large-scale data processing on clusters of commodity servers. The programming model provides an easy-to-understand abstraction for designing scalable algorithms, while the execution framework transparently handles many system-level details, ranging from scheduling to synchronization to fault tolerance.
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