Pure Storage, Inc.
Rebuilding data in a distributed storage network

Abstract:

A method for rebuilding data in a distributed storage network (DSN) including a plurality of storage units. A rebuilding module of the DSN selects an address range associated with memory of a storage unit of the DSN, and initiates execution of data rebuilding activities for the selected address range. The rebuilding module determines a first rebuilding rate of the storage unit for a timeframe subsequent to initiating the execution of the data rebuilding activities. The rebuilding module further operates to pause the execution of the data rebuilding activities for a pause timeframe, and determine a second rebuilding rate of the storage unit for the pause timeframe. In response to determining that the second rebuilding rate compares favorably to the first rebuilding rate, the rebuilding module resumes execution of the data rebuilding activities. If the comparison is unfavorable, a second address range is selected for data rebuilding activities.