Storage capacity tracking in storage systems

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code when executed by at least one processing device causes the at least one processing device:

• to monitor a plurality of write request operations directed to at least one storage volume of a storage system;
• to identify, utilizing (i) a sampling rate determined based at least in part on a volume size of the at least one storage volume and (ii) a sampling function that takes as input a volume identifier of the at least one storage volume and a sample size offset, a subset of the plurality of write request operations;
• to determine one or more changes to one or more storage capacity counters for one or more portions of the at least one storage volume that are written to by the subset of the plurality of write request operations;
• to generate one or more estimates for one or more overall storage capacity counters for the at least one storage volume based at least in part on (i) the determined one or more changes to the one or more storage capacity counters for the one or more portions of the at least one storage volume that are written to by the subset of the plurality of write request operations and (ii) the sampling rate;
• and
• to adjust one or more characteristics of the storage system based at least in part on the generated estimates for the one or more overall storage capacity counters.

A method comprising:

• monitoring a plurality of write request operations directed to at least one storage volume of a storage system;
• identifying, utilizing (i) a sampling rate determined based at least in part on a volume size of the at least one storage volume and (ii) a sampling function that takes as input a volume identifier of the at least one storage volume and a sample size offset, a subset of the plurality of write request operations;
• determining one or more changes to one or more storage capacity counters for one or more portions of the at least one storage volume that are written to by the subset of the plurality of write request operations;
• generating one or more estimates for one or more overall storage capacity counters for the at least one storage volume based at least in part on (i) the determined one or more changes to the one or more storage capacity counters for the one or more portions of the at least one storage volume that are written to by the subset of the plurality of write request operations and (ii) the sampling rate;
• and
• adjusting one or more characteristics of the storage system based at least in part on the generated estimates for the one or more overall storage capacity counters;
• wherein the method is performed by at least one processing device comprising a processor coupled to a memory.