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    • 3. 发明授权
    • Method and apparatus for synchronization in primary-backup replication schemes
    • 主备份复制方案同步的方法和装置
    • US08868862B2
    • 2014-10-21
    • US13339497
    • 2011-12-29
    • Kedar NamjoshiPramod KoppolAthansios StathopoulosGordon T. Wilfong
    • Kedar NamjoshiPramod KoppolAthansios StathopoulosGordon T. Wilfong
    • G06F17/30
    • G06F17/30G06F11/1438G06F11/1479G06F11/2038G06F11/2097
    • A primary-backup replication capability is disclosed. A primary process and a backup process participate in a synchronization process configured to synchronize state information of the primary and backup processes. The synchronization process operates in periods of time referred to as epochs. During the current epoch, the primary process computes state update information representing changes to the state information of the primary process since a previous epoch, and also buffers output messages generated during the current epoch in an associated output buffer dedicated for use in the current epoch. The primary process initiates a new epoch independent of receiving, from the backup process, a state update acknowledgement for the previous epoch. The output messages buffered for the current epoch are released from the associated output buffer after the primary process receives a state update acknowledgment for the current epoch and all output buffers of all previous epochs are empty.
    • 公开了主备份复制功能。 主进程和备份进程参与配置为同步主进程和备份进程的状态信息的同步进程。 同步过程在被称为时代的时间段内运行。 在当前纪元期间,主处理计算状态更新信息,表示从先前纪元开始对主处理状态信息的变化,并且还缓存在当前时期专用的相关输出缓冲器中的当前时期期间产生的输出消息。 主进程启动一个新的时代,独立于从备份过程接收先前时代的状态更新确认。 在主进程接收到当前时期的状态更新确认之后,从当前时期缓冲的输出消息从关联的输出缓冲器释放,并且所有以前的时期的所有输出缓冲区都为空。
    • 4. 发明申请
    • METHOD AND APPARATUS FOR SYNCHRONIZATION IN PRIMARY-BACKUP REPLICATION SCHEMES
    • 在主备复制方案中同步的方法和装置
    • US20130173876A1
    • 2013-07-04
    • US13339497
    • 2011-12-29
    • Kedar NamjoshiPramod KoppolAthansios StathopoulosGordon T. Wilfong
    • Kedar NamjoshiPramod KoppolAthansios StathopoulosGordon T. Wilfong
    • G06F12/16
    • G06F17/30G06F11/1438G06F11/1479G06F11/2038G06F11/2097
    • A primary-backup replication capability is disclosed. A primary process and a backup process participate in a synchronization process configured to synchronize state information of the primary and backup processes. The synchronization process operates in periods of time referred to as epochs. During the current epoch, the primary process computes state update information representing changes to the state information of the primary process since a previous epoch, and also buffers output messages generated during the current epoch in an associated output buffer dedicated for use in the current epoch. The primary process initiates a new epoch independent of receiving, from the backup process, a state update acknowledgement for the previous epoch. The output messages buffered for the current epoch are released from the associated output buffer after the primary process receives a state update acknowledgment for the current epoch and all output buffers of all previous epochs are empty.
    • 公开了主备份复制功能。 主进程和备份进程参与配置为同步主进程和备份进程的状态信息的同步进程。 同步过程在被称为时代的时间段内运行。 在当前纪元期间,主处理计算状态更新信息,表示从先前纪元开始对主处理状态信息的变化,并且还缓存在当前时期专用的相关输出缓冲器中的当前时期期间产生的输出消息。 主进程启动一个新的时代,独立于从备份过程接收先前时代的状态更新确认。 在主进程接收到当前时期的状态更新确认之后,从当前时期缓冲的输出消息从关联的输出缓冲器释放,并且所有以前的时期的所有输出缓冲区都为空。
    • 7. 发明申请
    • EFFICIENT PROTECTION SCHEME FOR MPLS MULTICAST
    • MPLS MULTICAST的有效保护方案
    • US20110158128A1
    • 2011-06-30
    • US12650752
    • 2009-12-31
    • Yigal BejeranoPramod Koppol
    • Yigal BejeranoPramod Koppol
    • H04L12/56H04L12/28
    • H04L45/24H04L12/1877H04L45/16H04L45/28H04L45/48H04L45/50
    • An efficient protection scheme for MPLS multicast is disclosed for protection of Point-to-Multi-Point LSP connections. The efficient protection scheme for MPLS multicast includes a pair of Redundant Multicast Trees for each multicast connection which connects the source of a multicast LSP to all its destinations in such a way that in the event of a single link or node failure in the network, every destination node is still connected to the root node in at least one of the two trees. Furthermore, a method is disclosed that ensures that existing Redundant Multicast Trees can adapt to changes in the set of destination nodes and/or network topology changes without significant modifications. The efficient protection scheme for MPLS multicast is particularly useful for reducing the protection bandwidth requirements over protection methods known in the art.
    • 为了保护点对多点LSP连接,公开了一种用于MPLS组播的有效保护方案。 MPLS组播的有效保护方案包括一对冗余组播树,用于将组播LSP的源连接到所有目的地,以使得在网络中单个链路或节点故障的情况下, 目的地节点仍然连接到两个树中的至少一个中的根节点。 此外,公开了一种确保现有冗余多播树可以适应目的地节点集合和/或网络拓扑变化中的变化而不进行重大修改的方法。 MPLS多播的有效保护方案对于通过本领域已知的保护方法来减少保护带宽要求特别有用。