本文基于安全策略的分层管理模型，提出了一个集目标求精和实体求精为一体的安全策略逐级求精算法。
Integrated with goal refinement method and entity refinement method, an algorithm of policy refinement is proposed in this paper on the basis of layered-policy model for security policy.
对于一个较大的集群，则需要一个分层的方式，且管理节点要连接到两个或多个服务节点，计算节点要从这些服务节点得到供应。
For larger clusters, a hierarchical approach is needed, with the management node being connected to two or more service nodes and the compute nodes being provisioned from the service nodes.
下面是与分层模式相关的两个具体构件：初始团队结构和初始配置管理数据存储结构。
There were, however, two concrete artifacts associated with the layers pattern: the initial team structure, and the initial configuration management data-store structures.
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