Storage system having cross node data redundancy and method and computer readable medium for same
Embodiments of the present invention generally provide for multi-dimensional disk arrays and methods for managing same and can be used in video surveillance systems for the management of real-time video data, image data, or combinations thereof.
1. A method, comprising:
forming a first level disk array from first level disk drives of a plurality of disk drives of a node of a plurality of nodes;
forming a second level disk array from second level disk drives of the plurality of disk drives of the node;
forming a third level disk array by subdividing the second level disk array into a plurality of third level disk drives;
making the third level disks drives available for providing data redundancy across a geographical site; and
rebuilding only a portion of the second disk array corresponding to a certain bit of a bitmap corresponding to a location on a particular disk.
2. The method of claim 1 , further comprising:
providing data redundancy across the plurality of disk drives, wherein the data redundancy comprises one of a RAID5 architecture and a RAID6 architecture.
3. The method of claim 1 , wherein a data layout across the first level disk array comprises a RAID0 architecture.
4. The method of claim 1 , wherein the forming the second level disk array further comprises:
subdividing the first level disk array of the node into the second level disk drives.
5. The method of claim 1 , further comprising:
restoring data using the second level disk array responsive to failure of the node.
6. The method of claim 1 , wherein the failure of the node includes temporary unavailability of the node.
7. The method of claim 1 , further comprising:
receiving an indication of an additional node having additional disk drives;
scanning the second level disk array to identify selected second level disk drives of the second level disk array for migration; and
migrating the selected disk drives to the additional node using online mirroring and copying.
8. The method of claim 7 , wherein the second level disk array has a width, and
wherein the method further comprises:
generating another second level disk array having a width larger than a width of the second level disk array.
9. The method of claim 1 , wherein the forming the second level disk array further comprises:
forming the second level disk array both the second level disk drives of the node and a second plurality of disk drives from another node of the plurality of nodes.
10. The method of claim 1 , further comprising:
receiving an indication that the particular disk has been restored.
11. A non-transitory computer readable medium comprising instructions that when executed by a processor cause the processor to perform:
forming a first level disk array from first level disk drives of a plurality of disk drives of a node of a plurality of nodes;
forming a second level disk array from second level disk drives of the plurality of disk drives of the node;
forming a third level disk array by subdividing the second level disk array into a plurality of third level disk drives;
making the third level disks drives available for providing data redundancy across a geographical site; and
rebuilding only a portion of the second disk array corresponding to a certain bit of a bitmap corresponding to a location on a particular disk.
12. The non-transitory computer readable medium of claim 11 , wherein the instructions further cause the processor to perform:
providing data redundancy across the plurality of disk drives, wherein the data redundancy comprises one of a RAID5 architecture and a RAID6 architecture.
13. The non-transitory computer readable medium of claim 11 ,
wherein a data layout across the first level disk array comprises a RAID0 architecture.
14. The non-transitory computer readable medium of claim 11 , wherein the forming the second level disk array further comprises:
instructions the processor perform
subdividing the first level disk array of the node into the second level disk drives.
15. The non-transitory computer readable medium of claim 11 , wherein the instructions further cause the processor to perform:
restoring data using the second level disk array responsive to failure of the node.
16. The non-transitory computer readable medium of claim 15 , wherein the failure of the node includes temporary unavailability of the node.
17. The non-transitory computer readable medium of claim 11 , wherein the instructions further cause the processor to perform:
receiving an indication of an additional node having additional disk drives;
scanning the second level disk array to identify selected second level disk drives of the second level disk array for migration; and
migrating the selected disk drives to the additional node using online mirroring and copying.
18. The non-transitory computer readable medium of claim 11 , wherein the second level disk array has a width, and
wherein the method further comprises:
generating another second level disk array having a width larger than a width of the second level disk array.