Friday, September 28, 2012

NoSQL and MapReduce

NoSQL is a wide variety of database systems that differ of the classical RDBMS based on SQL.

MapReduce is a framework that provides high performance in solving problems in a parallel way of computers, servers, clusters...

Here there is an interesting presentation about NoSQL and MapReduce:

And here a popular NoSQL Databases web page:

The CAP theorem says that, for a distributed system, it is impossible to simultaneously provide the following guarantees:
  • Consistency
  • Availability
  • Partition tolerance

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