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A pessimistic consistency control algorithm for replicated files which achieves high availability

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2 Author(s)

A consistency control algorithm is described for managing replicated files in the face of network partitioning due to node or communication link failures. It adopts a pessimistic approach in that mutual consistency among copies of a file is maintained by permitting files to be accessed only in a single partition at any given time. The algorithm simplifies the Davcev-Burkhard dynamic voting algorithm (1985) and also improves its availability by adding the notion of linearly ordered copies. A proof that any pessimistic algorithm with fresh reads is one-copy serializable is given

Published in:

Software Engineering, IEEE Transactions on  (Volume:15 ,  Issue: 1 )

Date of Publication:

Jan 1989

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