由于网络的延迟，以联邦模式运行查询一般比只访问本地数据的相同查询要慢一些。
Running a query in federated mode is usually slower compared to the same query that accesses only local data because of the network latency.
通常，如果联邦数据库不是分区的，受信任模式可以提供更好的性能。
In general, the trusted mode provides better performance if the federated database is not partitioned.
我认为，拥有受版本管理、基于兼容和联邦信息模型的服务与模式将促进服务的动态组合。
It is my claim that having versioned services and schemas based on compatible, federated information models will enable progressive composition of services.
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