Distributed set-expression cardinality estimation

Details Distributed set-expression cardinality estimation Distributed set-expression cardinality estimation

2011-01-18

2011-01-18

Vaughn, Jr., William C (Department: 2444)

Electrical computers and digital processing systems: multicomput

Miscellaneous

Reexamination Certificate

active

07873689

ABSTRACT:
A method and system for answering set-expression cardinality queries while lowering data communication costs by utilizing a coordinator site to provide global knowledge of the distribution of certain frequently occurring stream elements to significantly reduce the transmission of element state information to the central site and, optionally, capturing the semantics of the input set expression in a Boolean logic formula and using models of the formula to determine whether an element state change at a remote site can affect the set expression result.

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