Ensuring the fair utilization of system resources using workload based, time-independent scheduling

An apparatus for ensuring the fair utilization of system resources using workload based, time-independent scheduling, the apparatus including a computer memory and a computer processor, the computer memory including computer program instructions that, when executed by the computer processor, cause the apparatus to carry out the steps of:

• determining whether an amount of available system resources in the storage system has reached a predetermined reservation threshold;
• and
• responsive to determining that the amount of available system resources in the storage system has reached the predetermined reservation threshold:
• determining whether one or more entities in the storage system have utilized system resources in excess of their fair share by a predetermined threshold during one or more time-independent periods;
• and
• responsive to determining that one or more entities in the storage system have utilized system resources in excess of their fair share by the predetermined threshold during the time-independent period, limiting the one or more entities from issuing additional I/O requests to the storage system.

A storage system for ensuring the fair utilization of system resources using workload based, time-independent scheduling, the storage system including a computer memory and a computer processor, the computer memory including computer program instructions that, when executed by the computer processor, cause the storage system to carry out the steps of:

• determining whether an amount of available system resources in the storage system has reached a predetermined reservation threshold;
• and
• responsive to determining that the amount of available system resources in the storage system has reached the predetermined reservation threshold:
• determining whether one or more entities in the storage system have utilized system resources in excess of their fair share by a predetermined threshold during one or more time-independent periods;
• and
• responsive to determining that one or more entities in the storage system have utilized system resources in excess of their fair share by the predetermined threshold during the time-independent period, limiting the one or more entities from issuing additional I/O requests to the storage system.