Enhancing tiering storage performance

• US 9,021,203 B2
• Filed: 05/07/2012
• Issued: 04/28/2015
• Est. Priority Date: 05/07/2012
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hyde, Joseph Smith II, Roy, Subhojit
• Primary Examiner(s): Bradley, Matthew
• Assistant Examiner(s): PUCHE, TAHILBA O
• Application Number:
  US13/465,435
• Publication Number:
  US 20130297872A1
• Time in Patent Office: 1,086 Days
• Field of Search: 711/11
• US Class Current: 711/117
• CPC Class Codes: G06F 3/0608 Saving storage space on storage systems
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0611 in relation to response time
• CPC Class Codes: G06F 3/0641 De-duplication techniques
• CPC Class Codes: G06F 3/0649 Lifecycle management
• CPC Class Codes: G06F 3/0665 at area level, e.g. provisioning of virtual or logical volumes
• CPC Class Codes: G06F 3/0685 Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD

Abstract

Various embodiments for improving data storage and retrieval performance, for a tiered storage environment having levels corresponding to storage performance, are provided. In one embodiment, by way of example only, reference count information of at least one data segment maintained in the tiered storage environment is used to determine which of the levels in the tiered storage environment the at least one data segment will be assigned. Those of the at least one data segment having higher reference counts are assigned to a higher performance level than those having lower reference counts.

Claims

1. A system for improving performance in a computing environment, comprising:

a tiered storage system having levels of storage corresponding to storage performance;

a data deduplication engine in operable communication with the tiered storage system; and

a storage management module in operable communication with the deduplication engine and the tiered storage system, wherein the storage management module is configured for using reference count information of at least one data segment maintained in the tiered storage environment to determine which of the levels in the tiered storage environment the at least one data segment will be assigned, wherein those of the at least one data segment having higher reference counts are assigned to a higher performance level than those having lower reference counts, obtaining input/output performance data for input/output operations on the at least one data segment and transforming the input/output performance data into short term moving averages and long term moving averages, sorting the at least one data segment having higher reference counts such that the at least one data segment having the most activity is at a top of a list, comparing the short term moving averages of the at least one data segment in a performance level to the long term moving averages of the at least one data segment in the performance level and examining the reference count information of the at least one data segment in the performance level over time to determine whether a performance trend of the at least one data segment is increasing or decreasing, and promoting the at least one data segment to a higher performance level in the tiered storage environment, if the at least one data segment has an increasing performance trend.

2. The system of claim 1, wherein the reference count information is obtained from the data deduplication engine.

3. The system of claim 1, wherein the storage management module is further configured for monitoring the tiered storage environment to associate the reference count information with the at least one data segment.

4. The system of claim 3, wherein the storage management module is further configured for, upon a first access to the at least one data segment, and a determination that the at least one data segment has an associated reference count above a predetermined threshold, immediately migrating the at least one data segment to the higher performance level.

5. The system of claim 1, wherein the storage management module is further adapted for using the reference count information as a weighted factor with additional characteristics of the at least one data segment to determine which of the levels to assign the at least one data segment.

6. The system of claim 5, wherein the storage management module is further adapted for using an input/output activity, including at least one of a read count and a write count as the additional characteristics to determine which of the levels to assign the at least one data segment.

7. The system of claim 6, wherein the storage management module is further adapted for subsequently using the input/output activity solely to determine if the at least one data segment should be migrated from a higher performance level to a lower performance level.

8. A computer program product for improving data storage and retrieval performance in a computing environment by a processor, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

a first executable portion for, for a tiered storage environment having levels corresponding to storage performance, using reference count information of at least one data segment maintained in the tiered storage environment to determine which of the levels in the tiered storage environment the at least one data segment is assigned, wherein those of the at least one data segment having higher reference counts are assigned to a higher performance level than those having lower reference counts, obtaining input/output performance data for input/output operations on the at least one data segment and transforming the input/output performance data into short term moving averages and long term moving averages, sorting the at least one data segment having higher reference counts such that the at least one data segment having the most activity is at a top of a list, comparing the short term moving averages of the at least one data segment in a performance level to the long term moving averages of the at least one data segment in the performance level and examining the reference count information of the at least one data segment in the performance level over time to determine whether a performance trend of the at least one data segment is increasing or decreasing, and promoting the at least one data segment to a higher performance level in the tiered storage environment, if the at least one data segment has an increasing performance trend.

9. The computer program product of claim 8, further including a second executable portion for obtaining the reference count information from a data deduplication engine.

10. The computer program product of claim 8, further including a second executable portion for monitoring the tiered storage environment to associate the reference count information with the at least one data segment.

11. The computer program product of claim 10, further including a third executable portion for, upon a first access to the at least one data segment, and a determination that the at least one data segment has an associated reference count above a predetermined threshold, immediately migrating the at least one data segment to the higher performance level.

12. The computer program product of claim 8, further including a second executable portion for, pursuant to using the reference count information, using the reference count information as a weighted factor with additional characteristics of the at least one data segment to determine which of the levels to assign the at least one data segment.

13. The computer program product of claim 12, further including a third executable portion for using an input/output activity, including at least one of a read count and a write count as the additional characteristics to determine which of the levels to assign the at least one data segment.

14. The computer program product of claim 13, further including a fourth executable portion for subsequently using the input/output activity solely to determine if the at least one data segment should be migrated from a higher performance level to a lower performance level.