Solid-state disks wear leveling with predictive migration of data devices in a raid container system

An apparatus comprising:

• a data storage node in which storage capacity of an array of solid-state drives (SSDs) is characterized by equal-size redundant array of independent disk (RAID) containers that each have W same-size cells corresponding to a RAID width W, the W cells per container distributed over W SSDs, each of the containers subdivided into equal-size data devices that are logical disk drives that exhibit non-linear wear rates that increase and decrease, with a non-zero number of empty data devices reserved as spare storage capacity for RAID failure recovery, and each data device distributed over W SSDs;
• and
• an SSD wear control program configured to compute and implement SSD wear leveling by:
• computing predicted future wear rates of each of the data devices using time-series forecasting based on Support Vector Regression (SVR);
• and
• causing data to migrate from high-wear rate data devices on high-wear level SSDs to empty data devices on SSDs that are not high-wear level.

A non-transitory computer-readable storage medium stores instructions that when executed by one or more computers cause the computers to perform a method comprising:

• configuring storage capacity of an array of solid-state drives (SSDs) by:
• creating equal-size redundant array of independent disk (RAID) containers that each have W same-size cells corresponding to a RAID width W;
• distributing the W cells per container over W SSDs;
• subdividing each of the containers into equal-size data devices that are logical disk drives that exhibit non-linear wear rates that increase and decrease, with a non-zero number of empty data devices reserved as spare storage capacity for RAID failure recovery;
• and
• distributing each data device over W SSDs;
• and
• computing and implementing SSD wear leveling by:
• computing predicted future wear rates of each of the data devices using time-series forecasting based on Support Vector Regression (SVR);
• and
• migrating data from high-wear rate data devices on high-wear level SSDs to empty data devices on SSDs that are not high-wear level.