HEALTH-AWARE GARBAGE COLLECTION IN A MEMORY SYSTEM

A data storage system includes a controller that controls a non-volatile memory array including a plurality of garbage collection units of physical memory. For each of the plurality of garbage collections units storing valid data, the controller determines an invalidation metric and a health-based a...

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Bibliographic Details
Main Authors TOMIC, SASA, PLETKA, ROMAN A
Format Patent
LanguageEnglish
Published 14.06.2018
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:A data storage system includes a controller that controls a non-volatile memory array including a plurality of garbage collection units of physical memory. For each of the plurality of garbage collections units storing valid data, the controller determines an invalidation metric and a health-based adjustment of the invalidation metric. The controller selects a garbage collection unit on which to perform garbage collection from among a plurality of garbage collections units predominately based on the invalidation metric for the garbage collection unit and also based on the health-based adjustment for the garbage collection unit. In response to selection of the garbage collection unit, the controller performing garbage collection for the garbage collection unit.
Bibliography:Application Number: US201615376309