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    • 2. 发明授权
    • Static inheritance systems and methods
    • 静态继承系统和方法
    • US08250528B2
    • 2012-08-21
    • US11012409
    • 2004-12-15
    • Henricus Johannes Maria MeijerSergey DubinetsYan V. LeshinskyEvgeny N. Veselov
    • Henricus Johannes Maria MeijerSergey DubinetsYan V. LeshinskyEvgeny N. Veselov
    • G06F9/44
    • G06F9/4492
    • The subject invention pertains to a system and method of extending programming languages to enable static inheritance. In particular, static subclasses can be defined which extend class functionality and/or behaviors without extending base class state. The subclasses can be specified to include static fields as well as static or instance methods and/or properties that provide a more specific interpretation of an object without extending the state thereof. Furthermore, a static subclass can be specified to provide for type aliasing. Casting is also enabled in both directions between base class type and derived class type in a convenient manner without run-time performance penalties. According to one aspect of the invention, the disclosed systems and methods can be employed to create specific programmatic context, for instance for accessing, manipulating, and type checking external data (e.g., XML).
    • 本发明涉及一种扩展编程语言以实现静态继承的系统和方法。 特别地,可以定义静态子类,其扩展类功能和/或行为,而不扩展基类状态。 子类可以指定为包括静态字段以及静态或实例方法和/或属性,可以在不扩展对象的状态的情况下提供对对象的更具体的解释。 此外,可以指定静态子类来提供类型别名。 在方便的方式下,也可以在基类类型和派生类类型之间的两个方向上启用转换,而无需运行时性能损失。 根据本发明的一个方面,所公开的系统和方法可用于创建特定的编程上下文,例如用于访问,操纵和类型检查外部数据(例如,XML)。
    • 5. 发明授权
    • Dynamic placement of replica data
    • 动态放置副本数据
    • US08560639B2
    • 2013-10-15
    • US12430018
    • 2009-04-24
    • Elissa E. S. MurphyYan V. LeshinskyJohn D. Mehr
    • Elissa E. S. MurphyYan V. LeshinskyJohn D. Mehr
    • G06F15/16G06F15/173G06F17/00
    • G06F17/30215G06F11/1446G06F11/2094G06F17/30212
    • The claimed subject matter relates to systems and/or methodologies that facilitate distributed storage of data. A distributed file system can be implemented on storage nodes such that the system places multiple copies of data (e.g., replicas) on a variety of disparate storage nodes to guarantee availability of the data and minimize loss of the data. Storage nodes are dynamically evaluated to identify respective characteristics. In one example, the characteristics can include availability of a storage node, capacity of a storage node, data storage cost associated with a storage node, data transfer costs associated with a storage node, locality of a storage node, network topology, or user preferences associated with a storage node. The characteristics can be employed to generate optimal placements decisions.
    • 所要求保护的主题涉及促进数据分布式存储的系统和/或方法。 可以在存储节点上实现分布式文件系统,使得系统将多个数据副本(例如,副本)放置在各种不同的存储节点上,以保证数据的可用性和最小化数据丢失。 动态评估存储节点以识别相应的特征。 在一个示例中,特征可以包括存储节点的可用性,存储节点的容量,与存储节点相关联的数据存储成本,与存储节点相关联的数据传输成本,存储节点的位置,网络拓扑或用户偏好 与存储节点相关联。 可以使用这些特征来产生最佳的布局决定。