Reducing concurrency of garbage collection operations
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United States of America Patent
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Jan 30, 2018
Grant Date -
Dec 21, 2017
app pub date -
Jun 21, 2016
filing date -
Jun 21, 2016
priority date (Note) -
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Abstract
Methods, computing systems and computer program products implement embodiments of the present invention that include identifying, in a storage system including multiple storage devices having respective sets of storage regions, respective default low storage region thresholds that are used for garbage collection. For each given storage region, a time threshold and an alternative low storage region threshold greater than the default low storage region threshold for the given storage device are defined. While processing input/output operations for each given storage device, a count of unused storage regions in the given storage device is maintained, a timer is initialized, and upon the timer matching the time threshold for the given storage device and upon the count of unused storage regions being less than or equal to the alternative low storage region threshold, a garbage collection operation is initiated. In some embodiments, processing the input/output operations includes using a log-structured array format.
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