Distributed service level management with performance resilience objectives

A system for managing an I/O request for a storage system, the system comprising:

• one or more processors;
• and
• a memory comprising code stored thereon that, when executed, performs a method comprising:
• receiving an I/O request specifying an I/O operation to perform for an application having data stored on the data storage system, the application having an associated first value indicative of a performance objective for a performance metric;
• and
• controlling a performance of the I/O operation based on the first value associated with the application and a second value indicative of a tolerance of deviation of actual performance from the first value over time,
• wherein the first value specifies an average response time, and wherein the second value specifies an extent to which an actual response time is allowed to deviate over time from the average response time.

A non-transitory computer-readable medium having software stored thereon for managing an I/O request for a storage system, the software comprising:

• executable code that receives an I/O request specifying an I/O operation to perform for an application having data stored on the data storage system, the application having an associated first value indicative of a performance objective for a performance metric;
• and
• executable code that controls a performance of the I/O operation based on the first value associated with the application and a second value indicative of a tolerance of deviation of actual performance from the first value over time,
• wherein the first value specifies an average response time, and wherein the second value specifies an extent to which an actual response time is allowed to deviate over time from the average response time.