Patent ID: 9703500
Date: 2017-07-11
CPC Classifications: G06F,Y02D

Claim:
1. A method, in a data processing system, for managing data segments in a tiered storage system, comprising: recording first usage pattern information for storage devices in a first tier of the tiered storage system using a counter with a first set of counters for each given storage device that measures an operations per second rate for the entire given storage device; recording second usage pattern information for data segments in the storage devices using a second set of counters that measure an operations per second rate the data segments; analyzing the recorded first usage pattern information and the recorded second usage pattern information for a period of time of off-peak utilization of the tiered storage system; identifying, based on results of the analysis of the recorded first usage pattern information for the period of time of off-peak utilization of the tiered storage system, one or more first storage devices in the first tier of the tiered storage system that are accessed during the period of time of off-peak utilization of the tiered storage system at an operations per second rate lower than a cold storage device threshold and may be placed in a minimal power consumption state; identifying, based on results of the analysis of the recorded second usage pattern information for the period of time of off-peak utilization of the tiered storage system, one or more data segments stored on the identified one or more first storage devices that are most likely to be accessed during a period of time in which the one or more first storage devices are in the minimal power consumption state; migrating the one or more data segments to one or more second storage devices in one of the first tier or a second tier of the storage system; and placing the one or more first storage devices in the minimal power consumption state, wherein access requests to the one or more data segments are serviced by the one or more second storage devices while the one or more first storage devices are in the minimal power consumption state.