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    Controlling data lag in a replicated computer system
    1.
    发明授权
    Controlling data lag in a replicated computer system 有权
    控制复制计算机系统中的数据滞后

    公开(公告)号：US08838919B2

    公开(公告)日：2014-09-16

    申请号：US12871805

    申请日：2010-08-30

    申请人： Jia Shi ,  Wei M. Hu ,  Vinay H. Srihari ,  Yunrui Li ,  Mahesh B. Girkar ,  Benedicto E. Garin, Jr.

    发明人： Jia Shi ,  Wei M. Hu ,  Vinay H. Srihari ,  Yunrui Li ,  Mahesh B. Girkar ,  Benedicto E. Garin, Jr.

    IPC分类号： G06F12/00 ,  G06F11/20 ,  G06F17/30

    CPC分类号： G06F17/30581 ,  G06F11/2094 ,  G06F11/2097 ,  G06F2201/80 ,  Y10S707/99955

    摘要： A method and system is provided for measuring, guaranteeing, and reducing replication data lag time between a primary system and one or more standby systems. Each standby system determines the lag time between the generation of a consistent version of data on the primary system and the time that the consistent version is applied on the standby system. Applications can request and be guaranteed to receive data from a standby system that is identical to the state on the primary system at the time of the query, or lag the primary state only by a maximum tolerable amount. A standby system may also publish a service that guarantees a maximum lag time and withdraw the service offer when the actual lag time exceeds the guaranteed lag time.Implications for implementing synchronous and asynchronous replication as well as performance optimizations are also discussed.

    摘要翻译： 提供了一种方法和系统，用于测量，保证和减少主系统与一个或多个备用系统之间的复制数据滞后时间。 每个备用系统确定在主系统上生成一致版本的数据与在备用系统上应用一致版本的时间之间的滞后时间。 应用程序可以请求并保证从查询时与主系统上的状态相同的备用系统接收数据，或仅以最大可容忍的数量滞后于主状态。 备用系统还可以发布保证最大延迟时间的服务，并且当实际滞后时间超过保证滞后时间时撤回服务报价。 还讨论了实现同步和异步复制以及性能优化的意义。

    Controlling Data Lag in a Replicated Computer System
    2.
    发明申请
    Controlling Data Lag in a Replicated Computer System 有权
    控制复制计算机系统中的数据滞后

    公开(公告)号：US20120054533A1

    公开(公告)日：2012-03-01

    申请号：US12871805

    申请日：2010-08-30

    申请人： Jia Shi ,  Wei M. Hu ,  Vinay H. Srihari ,  Yunrui Li ,  Mahesh B. Girkar ,  Benedicto E. Garin, JR.

    发明人： Jia Shi ,  Wei M. Hu ,  Vinay H. Srihari ,  Yunrui Li ,  Mahesh B. Girkar ,  Benedicto E. Garin, JR.

    IPC分类号： G06F17/30 ,  G06F11/20 ,  G06F11/07

    CPC分类号： G06F17/30581 ,  G06F11/2094 ,  G06F11/2097 ,  G06F2201/80 ,  Y10S707/99955

    摘要： A method and system is provided for measuring, guaranteeing, and reducing replication data lag time between a primary system and one or more standby systems. Each standby system determines the lag time between the generation of a consistent version of data on the primary system and the time that the consistent version is applied on the standby system. Applications can request and be guaranteed to receive data from a standby system that is identical to the state on the primary system at the time of the query, or lag the primary state only by a maximum tolerable amount. A standby system may also publish a service that guarantees a maximum lag time and withdraw the service offer when the actual lag time exceeds the guaranteed lag time.Implications for implementing synchronous and asynchronous replication as well as performance optimizations are also discussed.

    摘要翻译： 提供了一种方法和系统，用于测量，保证和减少主系统与一个或多个备用系统之间的复制数据滞后时间。 每个备用系统确定在主系统上生成一致版本的数据与在备用系统上应用一致版本的时间之间的滞后时间。 应用程序可以请求并保证从查询时与主系统上的状态相同的备用系统接收数据，或仅以最大可容忍的数量滞后于主状态。 备用系统还可以发布保证最大延迟时间的服务，并且当实际滞后时间超过保证滞后时间时撤回服务报价。 还讨论了实现同步和异步复制以及性能优化的意义。

    Method and system for implementing parallel transformations of records
    3.
    发明授权
    Method and system for implementing parallel transformations of records 有权
    实现记录并行转换的方法和系统

    公开(公告)号：US09104662B2

    公开(公告)日：2015-08-11

    申请号：US12188521

    申请日：2008-08-08

    申请人： Vinay H Srihari ,  Jia Shi ,  Jonghyun Lee ,  Roger Hansen

    发明人： Vinay H Srihari ,  Jia Shi ,  Jonghyun Lee ,  Roger Hansen

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30

    摘要： An improved approach is described for implementing transformations of data records in high concurrency environments. Each transformation is performed in parallel at the source when the data record is first generated. According to one approach for data integrity validation, record generators compute an integrity checksum for a newly generated record before copying into a data unit in shared memory. Subsequent generators may aggregate integrity checksums for data records into checksums for data units incrementally. This approach achieves end-to-end protection of data records against corruption using an efficient method of maintaining verifiable data integrity. In another approach, compression and encryption data transformations may be performed by themselves, or in combination with an integrity checksum transformation.

    摘要翻译： 描述了一种用于在高并发环境中实现数据记录转换的改进方法。 当数据记录首次生成时，每个变换在源处并行执行。 根据数据完整性验证的一种方法，记录生成器在复制到共享存储器中的数据单元之前计算新生成的记录的完整性校验和。 随后的生成器可以将数据记录的完整性校验和聚集到数据单元的校验和中。 这种方法使用有效的维护可验证数据完整性的方法来实现端到端的数据记录保护。 在另一种方法中，压缩和加密数据转换可以自己执行，或者与完整性校验和转换相结合。

    Method and System for Implementing Parallel Transformations of Records
    4.
    发明申请
    Method and System for Implementing Parallel Transformations of Records 有权
    实现记录并行转换的方法和系统

    公开(公告)号：US20100036861A1

    公开(公告)日：2010-02-11

    申请号：US12188521

    申请日：2008-08-08

    申请人： Vinay H. Srihari ,  Jia Shi ,  Jonghyun Lee ,  Roger Hansen

    发明人： Vinay H. Srihari ,  Jia Shi ,  Jonghyun Lee ,  Roger Hansen

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30

    摘要： An improved approach is described for implementing transformations of data records in high concurrency environments. Each transformation is performed in parallel at the source when the data record is first generated. According to one approach for data integrity validation, record generators compute an integrity checksum for a newly generated record before copying into a data unit in shared memory. Subsequent generators may aggregate integrity checksums for data records into checksums for data units incrementally. This approach achieves end-to-end protection of data records against corruption using an efficient method of maintaining verifiable data integrity. In another approach, compression and encryption data transformations may be performed by themselves, or in combination with an integrity checksum transformation.

    摘要翻译： 描述了一种用于在高并发环境中实现数据记录转换的改进方法。 当数据记录首次生成时，每个变换在源处并行执行。 根据数据完整性验证的一种方法，记录生成器在复制到共享存储器中的数据单元之前计算新生成的记录的完整性校验和。 随后的生成器可以将数据记录的完整性校验和聚集到数据单元的校验和中。 这种方法使用有效的维护可验证数据完整性的方法来实现端到端的数据记录保护。 在另一种方法中，压缩和加密数据转换可以自己执行，或者与完整性校验和转换相结合。

    NODE DEATH DETECTION BY QUERYING
    7.
    发明申请
    NODE DEATH DETECTION BY QUERYING 有权
    通过查询进行死亡检测

    公开(公告)号：US20130262937A1

    公开(公告)日：2013-10-03

    申请号：US13431196

    申请日：2012-03-27

    申请人： Vijay SRIDHARAN ,  Huy Nguyen ,  Jia Shi ,  Alex Tsukerman ,  Kothanda Umamageswaran

    发明人： Vijay SRIDHARAN ,  Huy Nguyen ,  Jia Shi ,  Alex Tsukerman ,  Kothanda Umamageswaran

    IPC分类号： G06F11/00 ,  H04L12/26

    CPC分类号： G06F11/0709 ,  G06F11/076 ,  H04L43/0817 ,  H04L43/10 ,  H04L43/16

    摘要： Systems, methods, and other embodiments associated with detecting a node death in a clustered distributed system are described. In one embodiment, a method includes transmitting a ping message to a peer node in the network. If a reply to the ping message is not received from the peer node, a query is sent to table of port identifiers that lists ports in the cluster. In one embodiment, the query includes a port identifier associated with the peer node. The peer node is declared as inactive/dead when the query fails to locate a match in the table for the port identifier. When the query locates a match in the table for the port identifier, another ping message is periodically transmitted to the peer node.

    摘要翻译： 描述了与群集分布式系统中的节点死亡检测相关联的系统，方法和其他实施例。 在一个实施例中，一种方法包括将ping消息发送到网络中的对等节点。 如果没有从对等节点接收到ping消息的回复，则会将查询发送到列出集群端口的端口标识符表。 在一个实施例中，查询包括与对等节点相关联的端口标识符。 当查询无法在端口标识符的表中找到匹配时，对等节点被声明为非活动/已停止。 当查询查找端口标识符的表中的匹配时，会将另一个ping消息周期性地发送到对等节点。

    Digital image capturing module assembly and method of fabricating the same
    9.
    发明申请
    Digital image capturing module assembly and method of fabricating the same 审中-公开
    数字图像捕获模块组件及其制造方法

    公开(公告)号：US20050007484A1

    公开(公告)日：2005-01-13

    申请号：US10618434

    申请日：2003-07-10

    申请人： Kah-Ong Tan ,  Jia Shi

    发明人： Kah-Ong Tan ,  Jia Shi

    IPC分类号： H04N5/225

    CPC分类号： H04N5/2254 ,  H04N5/2253

    摘要： A digital image capturing module assembly and method of fabricating the same is proposed, which is used for the assembly of a digital image capturing module from a photosensitive printed circuit board and a lens holder. The proposed module assembly is characterized by the use of aligning posts on the lens holder to help align and secure the photosensitive printed circuit board in position on the lens holder as well as by the use of a washer to help provide a sealed light-impenetrable effect at the junction between the photosensitive printed circuit board and the lens holder so that no sidelight can pass therethrough to the inside of the lens holder. This feature allows the assembly process to be more simplified and less time-consuming to implement than prior art, which can help increase the yield of the assembly of digital image capturing module.

    摘要翻译： 提出了一种数字图像捕获模块组件及其制造方法，其用于从感光印刷电路板和透镜夹持器组装数字图像捕获模块。 所提出的模块组件的特征在于使用在镜头保持器上的对准柱以帮助将感光印刷电路板对准并固定在镜片保持器上的适当位置，以及通过使用垫圈来帮助提供密封的光不透明效果 在感光印刷电路板和透镜保持器之间的接合部处，使得侧面不能穿过透镜保持器的内部。 该特征允许组装过程比现有技术更简化并且更少耗时，这可以有助于提高数字图像捕获模块的组装的产量。