Patent ID: 9183219
Filing Date: 2015-11-10
Classification: G06F

Abstract:
1. A method for migrating data between tiers of a storage system, the method comprising: subdividing a storage capacity of the storage system into a set of territories; partitioning the set of territories into tiers; imposing a hierarchy on the tiers; providing a default policy for data migration based on a time since accessing one of the set of territories in one of the tiers, the default policy comprising respective default migration ages for each of the tiers, the respective default migration ages corresponding to respective time since accessing one of the set of territories in one of the tiers at which data migrates from a current tier to a destination tier in the hierarchy; providing a user interface for adjusting the respective default migration ages; and receiving, through the user interface, a user-specified migration age for at least one of the tiers that overrides the respective default migration age for the at least one of the tiers.