DATA STORAGE POWER CONSUMPTION THRESHOLD
A power consumption threshold is implemented to manage power consumed by a plurality of devices. A power consumption threshold may be selected for a data storage system having multiple drives. Policies may control operation of storage devices such as hard disk drives to ensure the power consumption threshold is not exceeded. The policies may implement procedures for scheduling hard disk drive operations based on disk drive power characteristics, scheduling maintenance tasks, managing device power states, and strategically scheduling device operations based on their current state. The policies may be implemented by a data manager application in communication with multiple tiers of a data storage system.
1 . A method for automatically managing power in a system of storage devices, comprising:
selecting a power consumption threshold not be exceeded by the storage devices system, the selected power threshold at or less than the normal power consumption of the system of storage devices;
controlling storage device power level power level based on storage device power characteristics and the selected power consumption threshold; and
scheduling maintenance tasks based on estimated power consumption and the selected power consumption threshold.
2 . The method of claim 1 , wherein controlling storage device power level includes controlling power-on and spin-up power level of a plurality of storage devices based on their spin-up power characteristics
3 . The method of claim 1 , wherein scheduling maintenance tasks includes allocating an amount of power consumption within the selected power consumption threshold to be used for storage device maintenance tasks.
4 . The method of claim 1 , further comprising scheduling I/O processing by storage devices to consume an amount of power that is less than the sum of the selected power consumption threshold and an allocation of power to be used for storage device maintenance tasks.
5 . The method of claim 1 , further comprising:
identifying multiple hard storage devices with a queue of requests to service; and
scheduling hard disk servicing based on power consumption of the hard disk.
6 . The method of claim 1 , further comprising:
determining the power required for each hard storage device to service its requests; and
scheduling the hard storage device service requests such that the selected power threshold is not exceeded.
7 . The method of claim 1 , wherein the power consumption threshold is less than fifty percent of normal power consumption for the storage device system.
8 . The method of claim 1 , further comprising transitioning a hard drive to a lower state based on the selected power consumption threshold and at least one of policy, hard drive recent power level, and historic power level pattern.
9 . A computer readable non-transitory storage medium having embodied thereon a program, the program being executable by a processor to perform a method for automatically managing power in a system of storage devices, the method comprising:
selecting a power consumption threshold not be exceeded by the storage device system, the selected power threshold at or less than the normal power consumption of the system of storage devices;
controlling storage device power level based on storage device power characteristics and the selected power consumption threshold; and
scheduling maintenance tasks based on estimated power consumption and the selected power consumption threshold.
10 . The computer readable non-transitory storage medium of claim 9 , wherein controlling storage device power level includes controlling spin-up power level of a plurality of storage devices based on their spin-up power characteristics
11 . The computer readable non-transitory storage medium of claim 9 , wherein scheduling maintenance tasks includes allocating an amount of power consumption within the selected power consumption threshold to be used for storage device maintenance tasks.
12 . The computer readable non-transitory storage medium of claim 9 , further comprising scheduling I/O processing by storage devices to consume an amount of power that is less than the sum of the selected power consumption threshold and an allocation of power to be used for storage device maintenance tasks.
13 . The computer readable non-transitory storage medium of claim 9 , further comprising:
identifying multiple hard storage devices with a queue of requests to service; and
scheduling hard disk servicing based on power consumption of the hard disk.
14 . The computer readable non-transitory storage medium of claim 9 , further comprising:
determining the power required for each hard storage device to service its requests; and
scheduling the hard storage device service requests such that the selected power threshold is not exceeded.
15 . The computer readable non-transitory storage medium of claim 9 , wherein the power consumption threshold is less than fifty percent of normal power consumption for the storage device system.
16 . The computer readable non-transitory storage medium of claim 9 , further comprising transitioning a hard drive to a lower state based on the selected power consumption threshold and at least one of policy, hard drive recent power level, and historic power level pattern.
17 . A data storage system, comprising;
a storage system having a plurality of hard drives;
a data manager in communication with the hard drives and having a processor, memory and one or more modules stored in memory, the one or more modules executable by the processor to:
select a power consumption threshold not be exceeded by the storage device system, the selected power threshold at or less than the normal power consumption of the system of storage devices;
control storage device power level based on storage device power characteristics and the selected power consumption threshold; and
schedule maintenance tasks based on estimated power consumption and the selected power consumption threshold.