适用于嵌入式实时数据库系统的接纳控制机制IACM

接纳控制机制IACM综合考虑事务的执行需求和价值，通过减少被系统接纳执行而过后又夭折的事务数量来减少资源浪费．与传统的依赖于事务优先级的抢占策略不同，在IACM中，只有高优先级事务的价值不小于被抢占事务的价值总和该事务才被接纳，其总体目标是使系统获得的价值最大；另外，IACM建立在基于替代的实时事务模型上，适用于嵌入式实时数据库系统．最后的模拟实验比较了各典型接纳控制策略的性能。

IACM:An Admission Control Mechanism for Embedded Real-Time Database Systems

Admission control mechanism, IACM, integrates the value of transactions with resource requirement. It preserves system resources by minimizing the likelihood of a transaction being accepted for execution but not being able to meet its deadline later. In IACM , one high priority transaction can be admitted only if its value is not littler than value summation of these transactions preempted by it when overload. The goal of IACM is to maximize system profit. In addition, IACM associates with the real time transaction model based on function alterative, so IACM suits for embedded real time database systems. At the later, the performance is compared through a stimulation system.