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    • 6. 发明授权
    • Directed graphs pertaining to read/write operations
    • 有关与读/写操作有关的图
    • US08997056B2
    • 2015-03-31
    • US12968910
    • 2010-12-15
    • Xiaozhou LiMehul A. Shah
    • Xiaozhou LiMehul A. Shah
    • G06F9/44G06F13/00G06F11/36
    • G06F11/3612G06F11/3636
    • A system comprises a processor and storage containing software executable by the processor. The storage also contains a trace log that contains information pertaining to read and write operations and, for each read and write operation, the information is indicative of a start time, a completion time, and a value targeted by the read or write operation, Based on the trace log, the software causes the processor to construct a directed graph comprising nodes as well as edges interconnecting at least some of the nodes, each node representing a read or write operation and determine whether the constructed directed graph has a cycle. At least one edge is at least one of a data edge representing a data precedence between operations and a time edge representing a time precedence between operations, and at least one edge is a hybrid edge representing both time and data precedence between operations.
    • 系统包括处理器和包含由处理器可执行的软件的存储器。 存储还包含跟踪日志,其中包含与读写操作有关的信息,并且对于每次读写操作,该信息表示开始时间,完成时间以及读/写操作所针对的值。基于 在跟踪日志上,软件使处理器构建包括节点以及互连至少一些节点的边缘的有向图,每个节点表示读取或写入操作,并且确定构造的有向图是否具有循环。 至少一个边缘是表示操作之间的数据优先级的数据边缘和表示操作之间的时间优先级的时间边缘中的至少一个,并且至少一个边缘是表示操作之间的时间和数据优先级的混合边缘。
    • 8. 发明授权
    • Data mirroring using batch boundaries
    • 数据镜像使用批量边界
    • US08850073B1
    • 2014-09-30
    • US11742549
    • 2007-04-30
    • John Wilkes
    • John Wilkes
    • G06F15/16G06F13/00
    • G06F11/2074G06F11/2064G06F11/2066G06F2201/835
    • Provided are, among other things, systems, methods and techniques for controlling data synchronization. Local data-writing operations, made across a number of logical storage units on different data-storage devices, are divided into batches, the batches corresponding to different time segments. The data-writing operations, together with an indication of boundaries between the batches, are transmitted to a remote data-storage location. The boundaries between the batches are determined by at least one of: (1) identifying a period of time of sufficient duration during which no data-writing operations were performed and declaring a point during said period of time as one of the boundaries, (2) obtaining agreement from a plurality of entities, and (3) declaring the boundaries at pre-scheduled points in time.
    • 除其他之外,提供用于控制数据同步的系统,方法和技术。 通过不同数据存储设备上的多个逻辑存储单元进行的本地数据写入操作分为批次,批次对应于不同的时间段。 数据写入操作以及批次之间的边界的指示被发送到远程数据存储位置。 批次之间的边界由以下至少之一确定:(1)识别在该时间段内没有执行数据写入操作并且在所述时间段内将点指定为边界之一的足够持续时间的时间段(2 )从多个实体获得协议,和(3)在预先计划的时间点上声明边界。
    • 9. 发明授权
    • Event processing for graph-structured data
    • 图形结构数据的事件处理
    • US08819078B2
    • 2014-08-26
    • US13549112
    • 2012-07-13
    • Indrajit RoyAlvin AuYoungVanish TalwarMichael Mihn-Jong Lee
    • Indrajit RoyAlvin AuYoungVanish TalwarMichael Mihn-Jong Lee
    • G06F17/30
    • G06F17/30286G06F17/30073G06F17/30321G06F17/30587G06F17/30958
    • Examples of the present disclosure may include methods, systems, and computer readable media with executable instructions. An example method for event processing for graph-structured data can include storing graph structured data. The graph structured data includes a plurality of vertex, edge, and/or property graph elements. The example method further includes defining a first graph view of a characteristic of vertex, edge, and/or property graph elements. A subgraph is determined as a subset of the plurality of vertex, edge, and/or property graph elements that have the characteristic of vertex, edge, and/or property graph elements defined by the first graph view. The vertex, edge, and/or property graph elements of the subgraph are processed responsive to a predefined event that occurs on at least one of the vertex, edge, and/or property graph elements of the subgraph.
    • 本公开的示例可以包括具有可执行指令的方法,系统和计算机可读介质。 用于图形结构化数据的事件处理的示例方法可以包括存储图形结构化数据。 图形结构化数据包括多个顶点,边缘和/或属性图形元素。 示例性方法还包括定义顶点,边缘和/或属性图表元素的特征的第一图形视图。 子图被确定为具有由第一图形视图定义的顶点,边缘和/或属性图形元素的特征的多个顶点,边缘和/或属性图形元素的子集。 响应于发生在子图的顶点,边缘和/或属性图表元素中的至少一个上的预定义事件来处理子图的顶点,边缘和/或属性图形元素。