US 9,430,158 B2 · In-flight command queue depth management

Abstract

An indication of an event is received at a storage controller. The indication of the event corresponds to a first severity. It is determined that the event is associated with a first stream of commands. It is determined whether the indication of the event is the first indication of the event received by the storage controller. If the indication of the event is the first indication of the event received by the storage controller, a maximum allowed count of in-flight commands to be less than a current count of in-flight commands is set. If the indication of the event is not the first indication of the event received by the storage controller, it is determined that the first severity is greater than a second severity corresponding to a previously received indication. If the first severity is greater than the second severity, the maximum allowed count of in-flight commands is decreased.

Claims18

Dependent claims

A method comprising:

receiving, by a storage server, an indication of an event, wherein the indication of the event corresponds to a first severity;
determining, by the storage server, when the event is associated with a first stream of commands, wherein the first stream of commands comprises a plurality of commands sharing a same stream indicator;
determining, by the storage server, when the indication of the event is a first indication of the event received by the storage server;
setting, by the storage server, a maximum allowed count of in-flight commands to be less than a current count of in-flight commands, when the indication of the event is the first indication of the event received by the storage server;
determining, by the storage server, that the first severity is greater than a second severity, when the indication of the event is not the first indication of the event received by the storage server, wherein the second severity corresponds to a previously received indication of the event;
and
decreasing, by the storage server, the maximum allowed count of in-flight commands, when the first severity is determined to be greater than the second severity.

4 more elements

A non-transitory machine readable medium having stored thereon instructions for preforming a method comprising machine executable code which when executed by at least one machine, causes the machine to:

receive an indication of an event, wherein the indication of the event corresponds to a first severity;
determine when the event is associated with a first stream of commands, wherein the first stream of commands comprises a plurality of commands sharing a same stream indicator;
determine when the indication of the event is a first indication of the event that is received;
set a maximum allowed count of in-flight commands to be less than a current count of in-flight commands, when the indication of the event is the first indication of the event received by the storage server;
determine that the first severity is greater than a second severity, when the indication of the event is not the first indication of the event received by the storage server, wherein the second severity corresponds to a previously received indication of the event;
and
decrease the maximum allowed count of in-flight commands, when the first severity is determined to be greater than the second severity.

4 more elements

A computing device comprising:

a memory containing a machine readable medium comprising machine executable code having stored thereon instructions for performing a method of event based tagging of storage system commands;
a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
receive an indication of an event, wherein the indication of the event corresponds to a first severity;
determine when the event is associated with a first stream of commands, wherein the first stream of commands comprises a plurality of commands sharing a same stream indicator;
determine when the indication of the event is a first indication of the event that is received;
set a maximum allowed count of in-flight commands to be less than a current count of in-flight commands, when the indication of the event is the first indication of the event received by the storage server;
determine that the first severity is greater than a second severity, when the indication of the event is not the first indication of the event received by the storage server, wherein the second severity corresponds to a previously received indication of the event;
and
decrease the maximum allowed count of in-flight commands, when the first severity is determined to be greater than the second severity.

6 more elements

Dependencies are inferred from the claim text.

In-flight command queue depth management

Life of this patent

In-flight command queue depth management

Life of this patent

Abstract

Claims18