Method and apparatus for balancing storage access on intelligent digital disk recorders

• US 8,281,104 B2
• Filed: 01/19/2007
• Issued: 10/02/2012
• Est. Priority Date: 01/19/2007
• Status: Active Grant

• Current Assignee: Grass Valley Canada (Belden Inc.)
• Original Assignee: Gvbb Holdings SARL (Vislink Technologies, Inc.)
• Inventors: Crowther, David Aaron, Pearce, James Edward, Naylor, John Robert
• Primary Examiner(s): Choe, Yong
• Application Number:
  US12/448,461
• Publication Number:
  US 20100023688A1
• Time in Patent Office: 2,083 Days
• Field of Search: 711/114, 711/117, 711/173, 711/E12.001
• US Class Current: 711/173
• CPC Class Codes: G06F 11/1076 Parity data used in redundant arrays of independent storages, e.g. in RAID systems
• CPC Class Codes: G06F 2206/1012 Load balancing
• CPC Class Codes: G06F 2211/1016 Continuous RAID, i.e. RAID system that allows streaming or continuous media, e.g. VOD
• CPC Class Codes: G06F 2211/1059 Parity-single bit-RAID5, i.e. RAID 5 implementations
• CPC Class Codes: G06F 2211/1064 Parity-single bit-RAID3, i.e. RAID 3 implementations
• CPC Class Codes: G06F 3/0613 in relation to throughput
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

A method includes designating at least three storage partitions on at least two logical drives, placing a first storage partition on a first of the logical drives adjacent to a second storage partition on a second of the logical drives separate from the first logical drives, and creating a third partition among both the first and second of the logical drives. The first, second and third partitions are balanced for storage access symmetry such that the drives bear equal storage placement.

Claims

1. A method comprising:

designating three storage partitions on two logical drives;

placing a first storage partition for operating system information solely on a first of said logical drives;

placing a second storage partition for at least one of database, metadata, and paging information solely on a second of said logical drives separate from said first logical drive;

creating a third partition for media information among both said first and second of said logical drives; and

placing information based on a type of the information, wherein the type is one of operating system information;

database, metadata, and paging information; and

media information.

2. The method of claim 1, wherein information is placed based on the type of the information in order to provide substantial storage access symmetry, such that the aggregate load of information stored on the first and second logical drives is approximately equal.

3. The method of claim 1, wherein said step of placing information based on type includes placing operating system information exclusively on said first storage partition.

4. The method of claim 3, wherein said step of placing information based on the type of the information includes placing at least one database, metadata and paging information exclusively on said second storage partition.

5. The method of claim 1, wherein the step of placing information based on the type of the information includes placing media information exclusively on said third storage partition.

6. The method of claim 1, wherein the first and second logical drives are respective first and second physical drives.

7. The method of claim 6, wherein the step of placing includes placing the first partition on outer cylinders of the first physical disk drive.

8. The method of claim 7, wherein the second partition is on the outer cylinders of the second physical disk drive.

9. The method of claim 8, wherein the step of creating includes creating the third partition on the inner cylinders of each physical disk drive.

10. The method of claim 1, wherein the first and second logical drives comprise greater than two physical disk drives.

11. The method of claim 1, wherein placing the information based on the type of the information includes:

if the information is operating system information, placing the information exclusively in the first partition;

wherein if the information is any of database, metadata, and paging information, placing the information exclusively in the second partition; and

wherein if the information is media information, placing the information exclusively in the third partition.

12. The method of claim 1, wherein the third partition is a striped partition spanning the first and second logical drives.

13. The method of claim 12, wherein the third partition is a RAID partition.

14. An apparatus comprising:

two logical drives comprising;

a first storage partition for operating system information solely on a first logical drive of the two logical drives;

a second storage partition for at least one of database, metadata, and paging information solely on a separate second logical drive of the two logical drives; and

a third storage partition for media information among both said first and second logical drives.

15. The apparatus of claim 14, wherein the first storage partition is for storing all of the operating system information for the two logical drives, the second storage partition is for storing all of the database, metadata and paging information for the two logical drives, and the third partition is for storing all of the media information for the two logical drives.

16. The apparatus of claim 14, wherein the logical drives comprise multiple physical disk drives.

17. The apparatus of claim 16, wherein the first storage partition is on the outer cylinders of the physical disk drives of the first logical drive, and the second storage partition is on the outer cylinders of the physical disk drives of the second logical drive, and the third storage partition is on the inner cylinders of the physical disk drives of both the first and second logical drives.

18. The apparatus of claim 14, wherein the logical drives are respective physical disk drives.

19. The apparatus of claim 18, wherein the first storage partition is on the outer cylinders of the first physical disk drive, the second storage partition is on the outer cylinders of the second physical disk drive and the third storage partition is on the inner cylinders of both physical disk drives.

20. The apparatus of claim 19, wherein if the information is operating system information, the information is stored exclusively on the first partition;

if the information is media information, the information stored exclusively on the third partition; and

if the information is any of database, metadata and paging information, the information is stored exclusively on the second partition.

21. The apparatus of claim 14, wherein the third partition is a striped partition spanning the first and second logical drives.

22. The apparatus of claim 21, wherein the third partition is a RAID partition.

23. The apparatus of claim 14, wherein information storage on said partitions is separated according to the type of the information among the first, second, and third partitions, such that the aggregate load on the first and second logical drives is approximately equal.