Abstract: A method processes data requests from a requester to a responder over a network by using remote direct memory access. The method includes the requester issuing two or more requests into a work queue of a network interface controller. The method further includes the network interface controller executing the queued requests by sending them to the responder, and receiving responses to the sent request from the responder. One or more given requests each includes dependency information related to the response from the responder to one or more previous requests in the work queue, the method further includes, before executing the given request by the network interface controller, evaluating the dependency information and executing the given request depending on the result of the evaluation.

Abstract: A method processes data requests from a requester to a responder over a network by using remote direct memory access. The method includes the requester issuing two or more requests into a work queue of a network interface controller. The method further includes the network interface controller executing the queued requests by sending them to the responder, and receiving responses to the sent request from the responder. One or more given requests each includes dependency information related to the response from the responder to one or more previous requests in the work queue, the method further includes, before executing the given request by the network interface controller, evaluating the dependency information and executing the given request depending on the result of the evaluation.

Abstract: An entity for RDMA is configured to maintain a time-based queue pair (QP). The time-based QP comprises a first area associated with a time-based indication and is configured to hold one or more first WQEs. The time-based indication indicates that the one or more WQEs in the first area are to be periodically processed. The entity is further configured to periodically process the one or more first WQEs in the first area according to the time-based indication.

Abstract: A sender and a receiver exchange packets of messages from multiple flows. Each packet includes a flow and a packet sequence number (PSN). An initial packet indicates a total number of packets in the message. The receiver receives a first packet of a first message of a first flow and discards the first packet if the first message cannot be processed. The receiver receives a second packet and discards the second packet if the second packet is of the first message, belongs to the first flow, or is of a different message and does not belong to the first flow, and a PSN of the second received packet is not equal to a sum of a PSN of the first packet, the total number of packets of the first message, and the total number of packets of any message discarded after discarding the first packet.

Abstract: A first node, a second node, and one or more third nodes for controlling a remote node via RDMA connection are provided. The first node is connected by RDMA connection to the second node and the third nodes, and the second node is connected by RDMA connection to the third nodes. The first node receives a read request for data from the second node, determines at which third node the data is available, and causes the third node to send the data to the second node. The third node is caused to send the data by receiving a RDMA write request or a send for a command from the first node. The third node sends the data by performing a RDMA write operation or a send operation in response to the command written by the first node directly to a send queue at the third node.

Abstract: In a memory access method, a receiver receives a memory access message from a sender in advance, determines an address of the receiver that is used to access a memory of the sender, and determines a mapping relationship between a virtual address and a corresponding physical address. Thus, provided the address of the receiver that is used to access a memory of the sender is registered with a memory region, the receiver may access a memory of the sender.

Abstract: A transmitting device and a receiving device are provided. The transmitting device is configured to: maintain a send queue, wherein the send queue comprises one or more WQEs, each WQE comprising destination information of the WQE; assign each of the one or more WQEs with an XID, and translate each WQE into a respective packet, wherein each respective packet comprises the XID of the corresponding WQE and is associated with a PSN; transmit each packet to the receiving device of the destination information of the WQE; and receive a notification message indicating whether the transmitted packet is received, for each transmitted packet from the receiving device; determine whether or not to generate a completion for each WQE, based on the notification message, on information carried in the WQE and information held by the transmitting device.

Abstract: An entity for RDMA is configured to maintain a time-based queue pair (QP). The time-based QP comprises a first area associated with a time-based indication and is configured to hold one or more first WQEs. The time-based indication indicates that the one or more WQEs in the first area are to be periodically processed. The entity is further configured to periodically process the one or more first WQEs in the first area according to the time-based indication.

Abstract: A method processes data requests from a requester to a responder over a network by using remote direct memory access. The method includes the requester issuing two or more requests into a work queue of a network interface controller. The method further includes the network interface controller executing the queued requests by sending them to the responder, and receiving responses to the sent request from the responder. One or more given requests each includes dependency information related to the response from the responder to one or more previous requests in the work queue, the method further includes, before executing the given request by the network interface controller, evaluating the dependency information and executing the given request depending on the result of the evaluation.