Solid-state disk (SSD) management

A management node comprising:

• a processor to:
• receive SSD wear-level data for each SSD of a plurality of SSDs on nodes, wherein the SSD wear-level data for each SSD includes frequency of writes;
• compute wear-rate based on the frequency of writes for each SSD from the SSD wear-level data for the SSD, wherein the wear-rate is a rate of change of wear calculated based on previous SSD wear-level data and current wear-level data determined from the SSD wear-level data;
• determining a recommendation to replace at least one of the SSDs with a hard disk or a replacement SSD based on the frequency of writes, wherein if performance is determined to be less than maximal, the recommendation is to replace the at least one SSD with the hard drive;
• otherwise the recommendation is to replace the at least one SSD with the replacement SSD;
• and
• redistribute loads among the nodes based on wear-rate of each SSD of the plurality of SSDs to extend the lifetimes of some SSDs.

A computer system comprising:

• a processor;
• and
• a non-transitory computer readable medium storing machine readable instructions executable by the processor to:
• collect SSD wear-level data for each of a plurality of SSDs from managed nodes having the plurality of SSDs, wherein the SSD wear-level data for each SSD includes frequency of writes;
• compute wear-rate for each SSD based on the frequency of writes from the SSD wear-level data for the SSD, wherein the wear-rate is a rate of change of wear calculated based on previous SSD wear-level data and current wear-level data determined from the SSD wear-level data;
• and generate a recommendation to replace an SSD of the plurality of SSDs with a hard disk or a replacement SSD based on the wear-rate for the SSD, wherein if performance is less than a maximal value determined based on the wear-rate for the SSD, the recommendation is to replace the SSD with the hard disk;
• otherwise the recommendation is to replace the SSD with the replacement SSD.