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    • 7. 发明授权
    • Predicate checking for distributed systems
    • 分布式系统的谓词检查
    • US08121824B2
    • 2012-02-21
    • US13077345
    • 2011-03-31
    • Xuezheng LiuWei LinZheng Zhang
    • Xuezheng LiuWei LinZheng Zhang
    • G06F17/50G06F15/173
    • G06F11/3688
    • Predicate checking in conjunction with distributed systems can enable an investigating user to check predicates in the context of instance states and/or distributed states of a distributed system. In an example embodiment, a method entails accepting distributed system simulation data and performing a simulation of a distributed system using the distributed system simulation data to create distributed system simulated states. At least a portion of the distributed system simulated states are exposed. The exposed portion of the distributed system simulated states is retrieved and stored as exposed states for the distributed system. The exposed states for the distributed system are compared to predicate states for the distributed system. If an inconsistency is detected between the exposed states and the predicate states based on the comparing, at least one alarm is issued.
    • 与分布式系统结合进行谓词检查可使调查用户能够在分布式系统的实例状态和/或分布式状态的上下文中检查谓词。 在示例实施例中,一种方法需要接受分布式系统仿真数据并且使用分布式系统仿真数据执行分布式系统的仿真以创建分布式系统模拟状态。 分布式系统的至少一部分模拟状态被暴露。 分布式系统的暴露部分模拟状态被检索并存储为分布式系统的暴露状态。 将分布式系统的暴露状态与分布式系统的谓词状态进行比较。 如果根据比较在暴露状态和谓词状态之间检测到不一致,则发出至少一个报警。
    • 10. 发明申请
    • SYSTEM AND METHOD FOR A DISTRIBUTED OBJECT STORE
    • 分布式对象存储系统和方法
    • US20100325476A1
    • 2010-12-23
    • US12855271
    • 2010-08-12
    • Zheng ZhangWei ChenYu ChenChao JinDan TeodosiuQiao LianShiding Lin
    • Zheng ZhangWei ChenYu ChenChao JinDan TeodosiuQiao LianShiding Lin
    • G06F11/20
    • H04L67/1097G06F11/1662G06F17/30575H04L69/40
    • An improved system and method for flexible object placement and soft-state indexing of objects in a distributed object store is provided. A distributed object store may be provided by a large number of system nodes operably coupled to a network. A system node provided may include an access module for communicating with a client, an index module for building an index of a replicated data object, a data module for storing a data object on a computer readable medium, and a membership and routing module for detecting the configuration of operable nodes in the distributed system. Upon failure of an index node, the failure may be detected at other nodes, including those nodes that store the replicas of the object. These nodes may then send new index rebuilding requests to a different node that may rebuild the index for servicing any access request to the object.
    • 提供了一种用于灵活对象放置和分布式对象存储中对象的软状态索引的改进的系统和方法。 分布式对象存储可以由可操作地耦合到网络的大量系统节点提供。 提供的系统节点可以包括用于与客户端通信的访问模块,用于构建复制数据对象的索引的索引模块,用于在计算机可读介质上存储数据对象的数据模块,以及用于检测的成员和路由模块 分布式系统中可操作节点的配置。 在索引节点发生故障时,可能会在其他节点(包括存储对象副本的那些节点)中检测到故障。 然后,这些节点可以将新的索引重建请求发送到不同的节点,该节点可以重建用于服务对对象的任何访问请求的索引。