默认角色和默认策略共同构成默认授权：多维数据集上针对没有显式访问规则的用户的隐式访问规则。
Together, the default role and default policy make up the default authorization: the implicit rule of access on the cube for users with no explicit rule of access.
事实上，没有任何大型拓扑可以在整个企业中保持同构。
The reality is that no large topology can remain homogenous across the entire enterprise.
OpenESB是JBI的一个开源实现，当其运行在GlassFish应用服务器上时，它包含了一个使用了集群jbi实例的同构拓扑选项。
OpenESB, an open source implementation of JBI, includes a homogeneous topology option using clustered JBI instances when run in a GlassFish Application Server.
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