System and method for managing storage device capacity use
Information handling system storage devices are managed to reduce power consumption by consolidating stored information to less than all of plural storage devices and powering down the storage devices that are no longer storing information. If a predetermined buffer of unused capacity is detected at the storage devices, then a powered down storage device is powered up to store additional information. The storage devices are consolidated to maintain desired performance parameters, such as by monitoring I/O performance for information stored on active storage devices.
1. A system for storing information, the system comprising:
plural storage devices, each storage device configured to store information;
a storage manager interfaced with the plural storage devices, the storage manager configured to manage the storage of information on the storage devices;
a consolidation engine associated with the storage manager, the consolidation engine configured to consolidate unused storage capacity of the plural storage devices into a first set of one or more of the storage devices by moving all of the information stored on the first set of one or more of the storage devices to one or more of the storage devices not included in the first set, the consolidation engine further configured to maintain at least a predetermined buffer of unused storage capacity at one or more of the storage devices not included in the first set;
a power manager associated with the storage manager, the power manager configured to shut down the first set of one or more storage devices having the unused storage capacity, the power manager further configured to restart a shut down storage device having unused capacity to maintain at least the predetermined buffer of unused storage capacity if less than the predetermined buffer exists at the one or more of the storage devices not included in the first set; and
a performance manager interfaced with the consolidation engine, the performance manager configured to manage consolidation of stored information to accomplish a parameter for information retrieval time of stored information.
2. The system of claim 1 wherein the storage devices comprise hard disk drives.
3. The system of claim 1 wherein the performance manager further comprises a tool to measure I/O performance at one or more storage devices.
4. The system of claim 1 wherein the storage manager comprises a storage area network.
5. The system of claim 1 wherein the storage manager comprises a RAID controller.
6. A method for storing information in plural storage devices, the method comprising:
identifying areas of each storage device having used and unused storage capacity;
consolidating used capacity of each storage device into contiguous blocks of storage on each storage device by analyzing stored information and transferring the information between storage devices according to a retrieval time parameter;
determining a number of storage devices needed to store the contiguous blocks of storage for all of the storage devices; and
transferring the contiguous blocks of information to the determined number of storage devices;
shutting down the storage devices having the unused capacity;
monitoring the storage devices to detect a predetermined buffer of unused capacity;
detecting that less than the predetermined buffer exists;
in response to the detecting, starting a shut down storage device having unused capacity to maintain at least the predetermined buffer of unused storage capacity and to store the information before the predetermined buffer is assigned to store information.
7. The method of claim 6 wherein consolidating the unused capacity further comprises:
consolidating used capacity into contiguous blocks of storage; and
adding a buffer of unused capacity into the contiguous block of storage of used capacity.
8. The method of claim 6 wherein the storage devices comprise hard disk drives.
9. The method of claim 6 wherein the storage devices comprise a storage area network.
10. The method of claim 6 wherein the storage devices comprise a RAID controller.
11. A system for managing storage devices, the system comprising:
a consolidation engine configured to consolidate information stored on the storage devices to less than all of the storage devices;
a performance manager interfaced with the consolidation engine, the performance manager configured to manage consolidation of stored information to accomplish a parameter for information retrieval time of stored information; and
a power manager configured to power down the storage devices that do not store the information;
wherein the consolidation engine consolidates the information by:
consolidating information stored on each of the storage devices into a contiguous block on each of the storage devices;
determining a number of the storage devices having capacity to store the contiguous blocks; and
transferring the contiguous blocks to the determined number of storage devices;
wherein the consolidation engine is further configured to monitor the storage devices to detect that less than a predetermined buffer of unused capacity is available to store information and to restart a powered down storage device in response to the detecting of the predetermined buffer before information exists to store in the predetermined buffer.
12. The system of claim 11 wherein the storage devices are hard disk drives.