|
计算机应用 2009
Query scheme and its optimization for distributed data stream
|
Abstract:
Stream database systems are a new type of database system designed to facilitate the execution of queries against continuous streams of data. Many stream-based applications are inherently distributed, Since input stream rates and other system parmeters such as the amount of abailable computing resources can fluctuate significantly, a stream query plan must be able to adapt to these changes. Propose a distributed stream query plan and optimized, use tuple response time and system throughput to evaluate the performance of plan. Compare with other plan by experiments.Proved this plan is optimal.