International Business Machines Corporation
Multi-tier coordination of destructive actions

Abstract:

A distributed storage network (DSN) processes storage unit maintenance tasks on multiple tiers within the DSN. A master storage unit coordinates pending maintenance tasks when a DSN management unit, originally processing the pending maintenance tasks, changes its status to offline. The method includes the master storage unit aggregating pending maintenance tasks from corresponding DSN storage units into an ordered list of maintenance tasks, facilitating, based on the ordered list of maintenance tasks, coordination of a next maintenance task with a corresponding storage unit and directing execution of the next maintenance task by the corresponding storage unit.