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    • 8. 发明授权
    • Resolving multiple master node conflict in a DDB
    • 解决DDB中的多个主节点冲突
    • US07730180B1
    • 2010-06-01
    • US11880325
    • 2007-07-20
    • Sriram KrishnanGregory W. Lazar
    • Sriram KrishnanGregory W. Lazar
    • G06F15/173
    • G06F17/30575
    • In a multinode computer network, a directory database (DDB) in each of the nodes, contents of the DDB being replicated throughout the network through use of one of its nodes having been appointed as master node. The master node updates each DDB in each node in its network or domain configuration when the configuration changes. A global administrator has authority to replace or select a master node and to configure a domain, and performs these and other functions by way of computer terminal screen dialogs offered by a graphical user interface (GUI) associated with the computer network. In the case of multiple master nodes attempting to be master for the same nodes in the same network at the same time, this conflict is resolved in one embodiment of the present invention by allowing the most recently selected purported master node to be the actual master node. After resolution of this conflict the result is communicated by the prevailing master node to all nodes in the network. This resolution takes into account a global network with varying time zones, and further takes into account the remote possibility of a simultaneous appointment of two masters.
    • 在多节点计算机网络中,每个节点中的目录数据库(DDB),DDB的内容通过使用其节点中的一个被指定为主节点而在整个网络中复制。 主节点在配置更改时更新其网络或域配置中每个节点中的每个DDB。 全局管理员有权替换或选择主节点并配置域,并通过与计算机网络相关联的图形用户界面(GUI)提供的计算机终端屏幕对话来执行这些和其他功能。 在多个主节点同时尝试对相同网络中的相同节点进行主机的情况下,通过允许最近选择的所声称的主节点是实际主节点来解决本发明的一个实施例中的这种冲突 。 解决此冲突后,结果将由主节点传送到网络中的所有节点。 该决议考虑到具有不同时区的全球网络,并进一步考虑到同时预约两位主人的远程可能性。
    • 10. 发明授权
    • Data replication facility for distributed computing environments
    • 用于分布式计算环境的数据复制工具
    • US07624155B1
    • 2009-11-24
    • US11360270
    • 2006-02-23
    • Richard J. NordinAndreas L. BauerSriram KrishnanGregory W. Lazar
    • Richard J. NordinAndreas L. BauerSriram KrishnanGregory W. Lazar
    • G06F15/16
    • G06F17/30194G06F11/1435G06F11/2094G06F11/2097H04L29/12132H04L61/1552H04L67/1095Y10S707/99953Y10S707/99955
    • A data replication facility for distributed computing environments. A computer network having a plurality of network nodes utilizes a distributed directory provider service (DPS) having an established master node. The DPS supports a file replication service (FRS). The FRS establishes one of the nodes as originator node which receives new or updated files from one or more user/GUIs and/or from one or more software providers such as a security provider. The originator node in cooperation with the master node establish a backup copy of the new or updated file in the master node. Thereafter, the originator node publishes a File Version Variable (FVV) representation of the new or updated file to other network nodes (slave nodes) which obtain such file from the originator or, if need be, from the backup master node. Object observers are utilized to determine changes to the file version variables thereby triggering the downloading of new or updated files into the network nodes, whereby data file replication is accomplished throughout the network. In addition to avoiding a single point of failure, embodiments of the present invention also are network-topology independent. Additional syncing threads are employed as part of the file replication service to further ensure synchronization of the network nodes' data files within a predetermined interval, regardless of network failure modes. Embodiments of the present invention are particularly useful with networks of the client-server storage network variety.
    • 用于分布式计算环境的数据复制工具。 具有多个网络节点的计算机网络利用具有建立的主节点的分布式目录提供商服务(DPS)。 DPS支持文件复制服务(FRS)。 FRS建立一个节点作为发起者节点,其从一个或多个用户/ GUI和/或从诸如安全提供商的一个或多个软件提供者接收新的或更新的文件。 与主节点协作的发起者节点在主节点中建立新的或更新的文件的备份副本。 此后,发起方节点将新的或更新的文件的文件版本变量(FVV)表示发布到从发起方获取这种文件的其他网络节点(从节点),或者如果需要,则从备份主节点发布。 利用对象观察者来确定对文件版本变量的更改,从而触发将新的或更新的文件下载到网络节点中,从而在整个网络中完成数据文件复制。 除了避免单点故障之外,本发明的实施例也是网络拓扑独立的。 额外的同步线程被用作文件复制服务的一部分,以进一步确保网络节点的数据文件在预定间隔内的同步,而不管网络故障模式如何。 本发明的实施例对于客户端 - 服务器存储网络品种的网络特别有用。