一种解决方案是在注册表中放置一个额外键表示机器的位置。
A solution would be to place in the registry an extra-key for the machine's location.
动态关系使用类似的表结构将键属性彼此关联；否则，实现实例创建和删除自动化就需要提供额外的上下文信息。
Dynamic relationships use a similar table structure to associate key attributes with each other; however, automating the creation and deletion of instances requires additional context information.
该创建类似于1个简单规则创建，但它展示了在每个事件流发生时使用映射键从数据库获取字段需要额外的性能开销。
This scenario is similar to the 1 simple rule scenario, but shows the additional performance cost of using a mapped key to retrieve a field from the database on every event flow.
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