连续查询的运算符调度方法

Operator Scheduling in Continuous Query System

在连续查询的数据流应用系统中,需要处理连续的大容量数据元组,由于有限的硬件条件限制,会出现未能及时处理的元组,导致内存耗尽的问题和输出延迟等问题,通过查询计划中运算符的调度方法分析,在不同的场合中综合运用发挥不同方法的优势,可以做到降低内存需求和输出延迟.

In the applications that require continuous query processing of high-volume data streams,when there is a buildup of unprocessed tuples,may lead to high output latency and run out of memory.In this paper,an operator scheduling strategy is present,it performs well for minimizing memory requirements and low output latency.