Some words about distributed frameworks

Some words about distributed frameworks in post Characterizing Enterprise Systems using the CAP theorem.
* RDBMS
* Amazon Dynamo
* Terracotta
* Oracle Coherence
* GigaSpaces
* Cassandra
* CouchDB
* Voldemort
* Google BigTable

BASE: An Acid Alternative

Cтатья. там же есть ссылка на pdf. Из статьи:
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Conclusion

Scaling systems to dramatic transaction rates requires a new way of thinking about managing resources. The traditional transactional models are problematic when loads need to be spread across a large number of components. Decoupling the operations and performing them in turn provides for improved availability and scale at the cost of consistency. BASE provides a model for thinking about this decoupling.

CAP Theorem

C == Consistency
A == Availability
P == Tolerance to network Partitions

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Theorem: You can have at most two of these properties for any shared-data system.
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Here the keynote speech by Eric Brewer at the ACM Symposium on the Principles of Distributed Computing (PODC) where he fist time introduce such theorem.

Two years later, in 2002, Seth Gilbert and Nancy Lynch of MIT, formally proved Brewer to be correct and thus Brewer's Theorem was born.

Very good disscussion about CAP-Theorem is here.