Continuous Monitoring of Distributed Data Streams over a Time-based Sliding Window

Ho-Leung Chan, Tak-Wah Lam, Lap-Kei Lee & Hing-Fung Ting
The past decade has witnessed many interesting algorithms for maintaining statistics over a data stream. This paper initiates a theoretical study of algorithms for monitoring distributed data streams over a time-based sliding window (which contains a variable number of items and possibly out-of-order items). The concern is how to minimize the communication between individual streams and the root, while allowing the root, at any time, to be able to report the global statistics of all...
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