International Business Machines Corporation
Deferred rebuilding with alternate storage locations

Abstract:

A method includes, when a first batch rebuild threshold is met, a computing device of a dispersed storage network (DSN) determining whether target storage units of a set of storage units of the DSN are available, where a data segment of data is dispersed storage error encoded into a set of encoded data slices, a number of encoded data slices that need rebuilding corresponds to the first batch rebuild threshold, and the number of encoded data slices is to be stored in the target storage units. When a target storage unit is unavailable, the method continues by delaying a batch rebuild process until the target storage unit is available or a second batch rebuild threshold is met. When the target storage unit becomes available before the second batch rebuild threshold is met, the method continues by executing the batch rebuild process for the number of encoded data slices.