MANAGING STORAGE OF CACHED CONTENT

• US 20100030963A1
• Filed: 08/04/2008
• Published: 02/04/2010
• Est. Priority Date: 08/04/2008
• Status: Abandoned Application

• Current Assignee: SanDisk IL Ltd. (Western Digital Corporation)
• Original Assignee: SanDisk IL Ltd. (Western Digital Corporation)
• Inventors: NOCHIMOWSKI, Alain, MARCU, Alon
• Application Number:
  US12/185,583
• Publication Number:
  US 20100030963A1
• Time in Patent Office: Days
• US Class Current: 711/118
• CPC Class Codes: G06F 12/0866 for peripheral storage systems, e.g. disk cache
• CPC Class Codes: G06F 12/0888 using selective caching, e.g. bypass
• CPC Class Codes: G06F 12/126 with special data handling, e.g. priority of data or instructions, handling errors or pinning

Abstract

A method of controlling storage of content on a storage device includes communicating with a storage device configured to cache content; and determining a storage cost for caching a first set of data objects on the storage device. The determining is based, at least in part, on characteristics of the first set of data objects and on characteristics of the storage device. Also provided is a storage system that includes a storage device capable of caching media content, a storage device agent and a cache manager. The storage device agent is operative to communicate with the storage device and with the cache manager, and to provide a storage cost to the cache manager. The storage device agent determines the storage cost for caching a data object on the storage device based, at least in part, on characteristics of the data object and on characteristics of the storage device.

Claims

1. A method of controlling storage of content on a storage device, the method comprising:

communicating with a storage device configured to cache content; and

determining a storage cost, for caching a first set of data objects on the storage device based, at least in part, on characteristics of the first set of data objects and on characteristics of the storage device.

2. The method of claim 1, further comprising:

controlling caching of the first set of data objects on the storage device based, at least in part, on the storage cost.

3. The method of claim 1, wherein the storage cost is determined based also on characteristics of data objects to be inserted.

4. The method of claim 1, wherein the storage cost is determined based also on characteristics of data object to be removed.

5. The method of claim 1, wherein the storage cost is determined based also on characteristics of data objects to be updated.

6. The method of claim 1, wherein the characteristics of the storage device include at least one of:

an internal structure of the storage device, age of the storage device, management capabilities of the storage device, correction capabilities of the storage device, history of the storage device, content already stored on the storage device, and environmental conditions of the storage device.

7. The method of claim 1, further comprising:

maintaining a database of information pertaining to the characteristics on which the determination of the storage cost is based.

8. The method of claim 1, further comprising:

dynamically updating the storage cost upon the change in the characteristics on which the determination of the storage cost is based.

9. The method of claim 1, wherein the storage cost is determined based also on characteristics of activity of a host affected by caching of data objects on the storage device.

10. A storage system operative to communicate with a host, the storage system comprising:

a storage device configured to cache content;

a storage device agent operative to determine a storage cost, for caching a first set of data objects on the storage device based, at least in part, on characteristics of the first set of data objects and on characteristics of the storage device; and

a cache manager that is operative to control caching of the first set of data objects, on the storage device, based, at least in part, on the storage cost, wherein the storage device agent is operative to communicate with the storage device and with the cache manager, and to provide the storage cost to the cache manager.

11. The storage system of claim 10, wherein the characteristics of the storage device include at least one of:

an internal structure of the storage device, age of the storage device, management capabilities of the storage device, correction capabilities of the storage device, history of the storage device, content already stored on the storage device, and environmental conditions of the storage device.

12. The storage system of claim 10, wherein the storage device has a configuration that complies with a flash technology.

13. The storage system of claim 10, wherein the storage device agent is embedded within the storage device.

14. The storage system of claim 10, wherein the storage device agent is part of a host housing the cache manager.