US 11,599,271 B2 · Controlling I/O Q-connections in NVMe devices

Abstract

Examples include selectively adjusting I/O Q-connections between an NVMe controller and a storage device in an NVMe system. In some examples, a utilization time of a host port in an NVMe controller is determined. In response to determining that the utilization time of the host port is lower than a host port utilization threshold and a number of I/O Q-connections at the storage device is less than an I/O Q-connection threshold for the storage device, a candidate list of storage devices is created, each storage devices included in the candidate list having an average service time greater than or equal to an average service time of a host port associated with the storage device. For each storage device included in the candidate list, processing time and I/O block size of I/O requests at the storage device is determined and a number of I/O Q-connections at the storage device is selectively adjusted based on the processing time and I/O block size of I/O requests at the storage device.

Claims20

Dependent claims

A method comprising:

determining a utilization time of a host port in an NVMe controller, wherein the host port is associated with a host and is to communicate with an NVMe storage device;
in response to determining that the utilization time of the host port is lower than a host port utilization threshold and a number of I/O Q-connections at the NVMe storage device is less than an I/O Q-connection threshold for the NVMe storage device, creating a candidate list of NVMe storage devices, each NVMe storage device included in the candidate list having an average service time greater than or equal to an average service time of a host port associated with the NVMe storage device;
and
for each NVMe storage device included in the candidate list:
determining processing time and I/O block size of I/O requests at the NVMe storage device;
and
selectively adjusting, based on the processing time and I/O block size of I/O requests, the number of I/O Q-connections at the NVMe storage device.

4 more elements

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

at least one processing resource and a non-transitory machine-readable storage medium comprising instructions executable by the at least one processing resource to:
determine a utilization time of a host port in an NVMe controller, wherein the host port is associated with a host and is to communicate with an NVMe storage device;
in response to determining that the utilization time of the host port is lower than a host port utilization threshold and a number of I/O Q-connections at the NVMe storage device is less than an I/O Q-connection threshold for the NVMe storage device, create a candidate list of NVMe storage devices, each NVMe storage device included in the candidate list having an average service time greater than or equal to an average service time of a host port associated with the NVMe storage device;
and
for each NVMe storage device included in the candidate list:
determine processing time and I/O block size of I/O requests at the NVMe storage device;
and
selectively adjust, based on the processing time and I/O block size of I/O requests, the number of I/O Q-connections at the NVMe storage device.

5 more elements

Dependencies are inferred from the claim text.

Controlling I/O Q-connections in NVMe devices

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Controlling I/O Q-connections in NVMe devices

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Abstract

Claims20