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    • 3. 发明申请
    • Failover mechanisms in RDMA operations
    • RDMA操作中的故障切换机制
    • US20060045005A1
    • 2006-03-02
    • US11017574
    • 2004-12-20
    • Robert BlackmoreFu ChangPiyush ChaudharyJason GoscinskiRama GovindarajuLeonard HelmerPeter HochschildJohn HoustonSteven MartinDonald Grice
    • Robert BlackmoreFu ChangPiyush ChaudharyJason GoscinskiRama GovindarajuLeonard HelmerPeter HochschildJohn HoustonSteven MartinDonald Grice
    • H04J1/16
    • H04L1/0079G06F11/1443H04L1/1809H04L2001/0097
    • In remote direct memory access transfers in a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, failures in the nodes or in the communication adapters can produce the phenomenon known as trickle traffic, which is data that has been received from the switch or from the network that is stale but which may have all the signatures of a valid packet data. The present invention addresses the trickle traffic problem in two situations: node failure and adapter failure. In the node failure situation randomly generated keys are used to reestablish connections to the adapter while providing a mechanism for the recognition of stale packets. In the adapter failure situation, a round robin context allocation approach is used with adapter state contexts being provided with state information which helps to identify stale packets. In another approach to handling the adapter failure situation counts are assigned which provide an adapter failure number to the node which will not match a corresponding number in a context field in the adapter, thus enabling the identification of stale packets.
    • 在多节点数据处理系统中的远程直接存储器访问传输中,其中节点通过耦合到交换机或网络的通信适配器彼此通信,节点或通信适配器中的故障可能产生称为流量流量的现象, 已经从交换机接收到的数据或者来自网络的数据已经过时,但是可能具有有效分组数据的所有签名。 本发明解决了两种情况下的流量流量问题:节点故障和适配器故障。 在节点故障情况下,随机生成的密钥用于重新建立与适配器的连接,同时提供用于识别过时数据包的机制。 在适配器故障情况下,使用循环上下文分配方法,适配器状态上下文被提供有状态信息,其有助于识别过时的分组。 在处理适配器故障情况的另一种方法中,分配了向适配器上下文字段中不匹配相应号码的节点提供适配器故障号,从而能够识别过时的数据包。
    • 6. 发明申请
    • Third party, broadcast, multicast and conditional RDMA operations
    • 第三方,广播,组播和有条件的RDMA操作
    • US20060045099A1
    • 2006-03-02
    • US11017355
    • 2004-12-20
    • Fu Chung ChangPiyush ChaudharyJason GoscinskiJohn HoustonSteven Martin
    • Fu Chung ChangPiyush ChaudharyJason GoscinskiJohn HoustonSteven Martin
    • H04L12/56H04L12/28
    • H04L69/16H04L69/166
    • In a multinode data processing system in which nodes exchange information over a network or through a switch, the mechanism which enables out-of-order data transfer via Remote Direct Memory Access (RDMA) also provides a corresponding ability to carry out broadcast operations, multicast operations, third party operations and conditional RDMA operations. In a broadcast operation a source node transfers data packets in RDMA fashion to a plurality of destination nodes. Multicast operation works similarly except that distribution is selective. In third party operations a single central node in a cluster or network manages the transfer of data in RDMA fashion between other nodes or creates a mechanism for allowing a directed distribution of data between nodes. In conditional operation mode the transfer of data is conditioned upon one or more events occurring in either the source node or in the destination node.
    • 在节点通过网络交换信息或通过交换机交换信息的多节点数据处理系统中,通过远程直接存储器访问(RDMA)实现无序数据传输的机制也提供了相应的能力来执行广播操作,组播 操作,第三方操作和有条件的RDMA操作。 在广播操作中,源节点以RDMA方式将数据分组传送到多个目的节点。 组播操作的工作方式类似,除了分发是有选择性的。 在第三方操作中,集群或网络中的单个中央节点以RDMA方式在其他节点之间管理数据传输,或者创建一种允许在节点之间定向分发数据的机制。 在条件操作模式中,数据的传输是在源节点或目标节点中发生的一个或多个事件的条件。