Data transmission and network interface controller

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• obtaining, by a first RDMA network interface controller of a first host, m data packets;
• sending, by the first RDMA network interface controller, the m data packets to a second RDMA network interface controller of a second host;
• backing up, by the first RDMA network interface controller, the m data packets;
• determining, by the first RDMA network interface controller, that the second RDMA network interface controller does not receive n data packets of the m data packets;
• and
• in response to determining that the second RDMA network interface controller does not receive n data packets of the m data packets
• (i) obtaining, by the first RDMA network interface controller, the n data packets from the m data packets that have been backed up by the first RDMA network interface controller, and
• (ii) retransmitting, by the first RDMA network interface controller, the n data packets that have been obtained by the first RDMA network interface controller from the m data packets that have been backed up by the first RDMA network interface controller, to the second RDMA network interface controller.

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• obtaining, by a first RDMA network interface controller of a first host, m data packets;
• sending, by the first RDMA network interface controller, the m data packets to a second RDMA network interface controller of a second host;
• backing up, by the first RDMA network interface controller, the m data packets;
• determining, by the first RDMA network interface controller, that the second RDMA network interface controller does not receive n data packets of the m data packets;
• and
• in response to determining that the second RDMA network interface controller does not receive n data packets of the m data packets
• (i) obtaining, by the first RDMA network interface controller, the n data packets from the m data packets that have been backed up by the first RDMA network interface controller, and
• (ii) retransmitting, by the first RDMA network interface controller, the n data packets that have been obtained by the first RDMA network interface controller from the m data packets that have been backed up by the first RDMA network interface controller, to the second RDMA network interface controller.