Huawei Technologies Co., Limited

Huawei Cloud Computing Technologies Co., Ltd.

Ben-Shahar Belkar

Lior Khermosh

Danny Volkind

Ronen Hyatt

Tal Mizrahi

Reuven Cohen

Alex Margolin

Dima Ruinskiy

Shai Bergman

Tanya Brokhman

Guy Shattah

Amit Golander

Yigal Korman

A method of data management in a data storage apparatus includes determining that a memory region (MR) stored in a first storage tier is suitable for hibernation. A tier-down operation is executed to move the MR to a second storage tier. In response to a remote direct memory access (RDMA) request to the MR from a client, a notification response is sent to the client to notify the client of the hibernated status of the MR. Moreover, in response to receiving a remote procedure call (RPC), from the client, the requested memory access is provided to the client. The requested memory access is provided to the client without any additional round-trip times (RTTs).

Data storage apparatus and method of data management in the data storage apparatus

A method for data transmission over a network and a related device are provided. The method includes generating, by a sending device a data packet for transmission, wherein a header of the data packet includes a routing hint field indicating a status of the data packet, and wherein the status is selected from a status list including a normal packet, a first packet in a heavy flow, wherein the heavy flow is a data flow having more than a predefined number of packets transmitted during a predefined period of time, and a last packet in the heavy flow. The method further includes transmitting, by the sending device, the data packet to a destination address over the network.

System and method for transmitting a data packet

A network device is configured to transmit an outgoing packet to another network device. The outgoing packet is a Quick User Datagram Protocol Internet Connection (QUIC)-based packet, which comprises a User Datagram Protocol (UDP) header, a QUIC header, and a QUIC payload. The UDP header comprises an indication that the QUIC payload comprises one or more RDMA transactions. The QUIC payload comprises the one or more RDMA transactions.

Device and method for romote direct memory access

The present disclosure relates to protocols for efficiently retransmitting lost data in a communication network. To this end, the disclosure proposes a first network device including processing circuitry configured to transmit a sequence of data packets to a second network device, receive at least one notification message from the second network device, and retransmit missing data packets as a next step after receiving the at least one notification message. The at least one notification message is indicative of both (i) a largest sequence number L of a data packet received at the second network device and (ii) one or more data packets that are missing from the sequence up to L at the second network device. Each missing data packet is indicated as a missing data packet after its first transmission, and a sequence number X of each missing data packet is less than L−K.

Device and method for selective retransmission of lost packets

A method and apparatus are described. The method comprises receiving a data packet comprising data to be written into the memory of a computing system and address data comprising an address in a set of addresses of a first address space of the computing system, identifying a subset of the set of addresses of the first address space with a subset of addresses in a second address space associated with the memory of the computing system, determining an address from a further subset of addresses in the second address space, writing the data to the region of the memory associated with the determined address and updating an address translation table on the computing system on the basis of the determined address.

Method and system for direct memory access

A computing system receives a data packet comprising data to be written to the computing system and address data comprising an address in a set of addresses of a first address space of the computing system. An address is determined in a second address space of the computing system identified with the address of the data packet and writing the data to the computing system on the basis of the determination. A first subset and a second subset of the set is identified and the first subset of addresses of the second address space is associated with a region of memory of the computing system and the second subset of addresses of the second address space is associated with a region of a data storage area.

A sending device is configured to generate a first message that includes a first indication of a first operation type; transmit the first message to a receiving device over the communications interface; generate a second message that includes a second indication of a second operation type; determine whether the second operation type is associated with the first operation type; determine, in response to determining that the second operation type is associated with the first operation type, that the local pacing timer has exceeded a timer duration since transmitting the first message; and transmit, in response to determining that the local pacing timer has exceeded the timer duration since transmitting the first message, the second message to the receiving device over the communications interface.

Devices, methods, and system for reducing latency in remote direct memory access system

A requesting device includes a memory, a controller, and a communication interface. The memory is configured to store a plurality of work elements in one or more requesting queues. Each work element indicates a requestor, a responder, and an operation. The controller is configured to retrieve at least a first work element of the plurality of work elements from the memory, generate a first hint message that includes an indication of at least one operation of the first work element, and transmit the first hint message to a first responding device over the communication interface. The first responding device corresponds to a first responder of the first work element. The controller is further configured to transmit a first request relating to the at least one operation of the first work element to the first responding device over the communication interface. The first request indicates the at least one operation.

Devices and methods for remote direct memory access

The present disclosure relates to a device for supporting Input/Output (I/O) channel protection. The device maintains one or more channel protection enclaves (CPEs), wherein each CPE is associated with a different I/O channel, wherein each I/O channel is associated with a different address space of a memory, and wherein each CPE is allocated verification information comprising the address space associated with its associated I/O channel. The device further receives a transaction on a given I/O channel, the transaction comprising access information including one or more target addresses. Moreover, the device determines a correlation of the transaction's access information and the verification information of the CPE associated with the given I/O channel, and allows or aborts execution of the transaction, based on whether the determined correlation meets a predefined criterion.

Devices and methods for supporting input/output channel protection

The present disclosure provides devices and methods relating to remote direct memory access (RDMA). In one implementation, a target device of the RDMA operation is configured to receive a packet including a first destination address and a destination key, obtain one or more offset values, and obtain a second destination address based on the first destination address, the destination key, and the one or more offset values. Further, the target device is configured to initiate the RDMA operation on a memory based on the second destination address.

Remote direct memory access with offset values

A first network device is configured to: transmit data packets and poll messages to a second network device; and receive, in response to each poll message, at least one status message from the second network device. The at least one status message indicates which of the data packets sent before that poll message have been correctly received at the second network device and/or have been lost. The first network device is configured to adapt a rate of transmitting the poll messages based on a set of parameters. Further, a second network device is configured to: receive data packets from a first network device; and transmit at least one unsolicited status message to the first network device, in case of certain conditions.

Growing community of inventors

Hod Hasharon, Israel

Ben-Shahar Belkar