Managing ssd write quotas in data storage systems

A system for use in managing flash drive write quotas in data storage systems, the system comprising:

• a storage processor and memory configured to:
• identify multiple sets of flash drives, wherein each set of flash drives store data arranged in multiple slices striped across the set of flash drives;
• predict, for each set of flash drives, a write rate at which data will be written to the multiple slices stored on the set of flash drives during a next time interval;
• determine, for each set of flash drives, a number of bytes that can be written to each set of flash drives, wherein the number is based on a remaining program/erase (PE) cycle count for each respective set of flash drives;
• determine, for each set of flash drives, a metric representative of a wear rate, the metric based on a respective flash drives determined predicted write rate and the determined number of bytes that can be written to each set of flash drives;
• determine a write quota threshold and a time interval for each set of flash drives;
• and
• if the metric exceeds the write quota for one or more sets of flash drives during the time interval, reduce the wear rate for the one or more sets of flash drives.

A computer-program product including a non-transitory computer-readable storage medium encoded with computer-program code that, when executed on a processor of a computer, causes the computer to manage data storage in a data storage system, the computer-program product further comprising:

• identifying multiple sets of flash drives, wherein each set of flash drives store data arranged in multiple slices striped across the set of flash drives;
• predicting, for each set of flash drives, a write rate at which data will be written to the multiple slices stored on the set of flash drives during a next time interval;
• determining, for each set of flash drives, a number of bytes that can be written to each set of flash drives, wherein the number is based on one or more program/erase (PE) cycle count values for each respective set of flash drives;
• determining, for each set of flash drives, a metric representative of a wear rate, the metric based on a respective flash drives determined predicted write rate and the determined number of bytes that can be written to each set of flash drives;
• determining a write quota threshold and a time interval for each set of flash drives;
• and
• if the metric exceeds the write quota for one or more sets of flash drives during the time interval, reducing the wear rate for the one or more sets of flash drives.