Automated tuning of a quality of service setting for a distributed storage system based on internal monitoring

A distributed storage system comprising:

• a processing resource;
• and
• a non-transitory computer-readable medium, coupled to the processing resource, having stored therein instructions that when executed by the processing resource cause the distributed storage system to:
• determine a set of volumes of a plurality of volumes of the distributed storage system,
• wherein each volume of the set of volumes satisfies a first QoS setting assigned to the volume and a second QoS setting assigned to the volume, and
• wherein the plurality of volumes are being utilized by a client;
• determine a subset of the set of volumes in which each volume of the subset satisfies an upper bound of a range based on a minimum input/output operations per second (IOPS) setting of the volume;
• and
• for one or more volumes of the subset:
• determine a new value of the first QoS setting that is less than a current value of the first QoS setting;
• and
• assign the new value of the first QoS setting to the respective volume for the client.

A non-transitory computer-readable storage medium embodying a set of instructions, which when executed by a processing resource of a distributed storage system, cause the distributed storage system to:

• for each volume of one or more volumes of a plurality of volumes of the distributed storage system being utilized by a client:
• determine a first number of observations within a time window in which the volume operates at below a minimum input/output operations per second (IOPS) setting of the volume;
• determine a second number of observations within the time window in which the volume operates at a range between the minimum IOPS setting and a maximum IOPS setting of the volume;
• determine a third number of observations within the time window in which the volume exceeds an upper bound of the range and in which the volume exceeds the maximum IOPS setting;
• determine whether a quotient based on the first, second, and third numbers of observations is greater than a percentage threshold;
• and
• responsive to determining that the quotient is greater than the percentage,
• increase the minimum IOPS setting of the volume, by:
• determining a new value of the minimum IOPS setting for the volume that is greater than a current value of the minimum IOPS setting;
• and
• assigning the new value of the minimum IOPS setting to the volume for the client.