US 12,754,696 B2 · Switch device for interfacing multiple hosts to a solid state drive

Abstract

A switch device is configured to communicate with a plurality of hosts and a solid state drive (SSD). The plurality of hosts includes a first host and a second host. The switch device receives a first memory access command from the SSD, the first memory access command including an indication of the first host to indicate the first memory access command is intended for the first host. The switch device uses the indication of the first host in the first memory access command to route the first memory access command to the first host. The switch device removes the indication of the first host from the first memory access command prior to sending the first memory access command to the first host via a peripheral computer interface express (PCIe) interface of the switch device.

Claims21

Dependent claims

A method implemented by a Non-Volatile Memory Express (NVMe) switch that is configured to communicate with a plurality of hosts and two or more solid state drives (SSDs), the plurality of hosts including a first host and a second host, the method comprising:

receiving, at the NVMe switch, a first storage access command from the first host, the first storage access command corresponding to a request to access storage;
identifying, by the NVMe switch, the first host that sent the first storage access command based on metadata associated with routing the first storage access command to the NVMe switch;
and
in response to receiving the first storage access command:
determining, by the NVMe switch, that the first storage access command corresponds to a first SSD among the two or more SSDs,
generating, by the NVMe switch, a second storage access command that corresponds to the first storage access command, including generating the second storage access command to include an identifier of the first host within a portion of the second storage access command to be included in a response to the second storage access command from the first SSD, and
sending, by the NVMe switch, the second storage access command to the first SSD.

4 more elements

A non-volatile memory express (NVMe) switch, comprising:

a peripheral computer interface express (PCIe) interface configured to communicatively couple the NVMe switch to a plurality of hosts including a first host and a second host;
a communication interface configured to communicatively couple the NVMe switch to two or more solid state drives (SSDs);
and
circuitry configured to:
receive, via the PCIe interface, a first storage access command from the first host, the first storage access command corresponding to a request to access storage,
identify the first host that sent the first storage access command based on metadata associated with routing the first storage access command to the NVMe switch, and
wherein the circuitry is further configured to, in response to receiving the first storage access command:
determine that the first storage access command corresponds to a first SSD among the two or more SSDs,
generate a second storage access command that corresponds to the first storage access command, including generating the second storage access command to include an identifier of the first host within a portion of the second storage access command to be included in a response to the second storage access command from the first SSD, and
send the second storage access command to the first SSD via the communication interface.

7 more elements

A non-transitory computer readable medium storing machine-readable instructions that, when executed by a processor of a non-volatile memory express (NVMe) switch, cause the processor to:

receive a first storage access command from a first host among a plurality of hosts, the first storage access command corresponding to a request to access storage;
identify the first host that sent the first storage access command based on metadata associated with routing the first storage access command to the NVMe switch;
and
in response to receiving the first storage access command:
determine that the first storage access command corresponds to a first solid state drive (SSD) among two or more SSDs communicatively coupled to the NVMe switch,
generate a second storage access command that corresponds to the first storage access command, including generating the second storage access command to include an identifier of the first host within a portion of the second storage access command to be included in a response to the second storage access command from the first SSD, and
send the second storage access command to the first SSD via a communication interface of the NVMe switch.

4 more elements

Dependencies are inferred from the claim text.

Switch device for interfacing multiple hosts to a solid state drive

Life of this patent

Switch device for interfacing multiple hosts to a solid state drive

Life of this patent

Abstract

Claims21