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{{Orphan|date=December 2013}}
The '''parallelization contract''' or '''PACT''' programming model is a generalization of the [[MapReduce]] [[programming model]] and uses [[Higher-order function|second order functions]] to perform concurrent computations on large ([[Petabyte]]s) data sets in parallel.
== Overview ==
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* Program structure: PACT allows the composition of arbitrary acyclic data flow graphs. In contract, MapReduce programs have a static structure (Map -> Reduce).
* Data Model: PACT's data model are records of arbitrary many fields of arbitrary types. MapReduce's KeyValue-Pairs can be considered as records with two fields.
[[Apache Flink|Apache Flink]], an open-source parallel data processing platform has implemented '''PACT'''s. Flink allows users to specify user functions with annotations.
== Logical view ==
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