MANAGING DATA WITHIN A CACHE

• US 20140136791A1
• Filed: 11/09/2012
• Published: 05/15/2014
• Est. Priority Date: 11/09/2012
• Status: Abandoned Application

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Fabijancic, Toni
• Application Number:
  US13/673,570
• Publication Number:
  US 20140136791A1
• Time in Patent Office: Days
• US Class Current: 711/134
• CPC Class Codes: G06F 16/24552 Database cache management

Abstract

A system and method for managing data within a cache is described. In sonic example embodiments, the system identifies and/or tracks consumers of data located within a cache, and maintains the data within the cache based on determining whether there is an active consumer of the data.

Claims

1. A method, comprising:

transferring from a data archive first data associated with a first structure of an archive file and second data associated with a second structure of the archive file to cache memory;

tracking a consumer that requested the first structure of the archive file and the second structure of the archive file to be transferred to the cache memory;

performing, within the cache memory, a relational operation between the first data and the second data;

determining that the consumer is finished with the requested first structure and the requested second structure; and

deleting the first data and the second data from the cache memory based on the determination that the consumer is finished with the request first structure and the requested second structure.

2. The method of claim 1, wherein tracking a consumer that requested the first structure of the archive file and the second structure of the archive file to be transferred to the cache memory includes tracking the consumer via a data structure that relates consumers of data stored in the cache memory with the data stored in the cache memory.

3. The method of claim 1, wherein tracking a consumer that requested the first structure of the archive file and the second structure of the archive file to be transferred to the cache memory includes tracking the consumer via a data structure that relates consumers of data stored in the cache memory with the data stored in the cache memory, and that is located within a cache that contains the cache memory.

4. The method of claim 1, wherein the archive file is an Archive Development Kit (ADK) file.

5. The method of claim 1, wherein the relational operation is a JOIN operation.

6. The method of claim 1, wherein the data archive is a relational database managed by a query language.

7. A computer-readable storage medium whose contents, when executed by a computing system, cause the computing system to perform operations for managing data objects stored within memory of a cache, comprising:

determining, via a cache manager located with the cache, whether a consumer of a data object stored within memory of a cache is currently utilizing the data object; and

managing the data object stored within the memory of the cache based on the determination.

8. The computer-readable storage medium of claim 7, wherein determining whether a consumer of a data object stored within memory of a cache is currently utilizing the data object includes determining that no consumer is currently utilizing the data object, the method further comprising:

deleting the data object stored within the memory of the cache based on the determination.

9. The computer-readable storage medium of claim 7, wherein determining whether a consumer of a data object stored within memory of a cache is currently utilizing the data object includes determining that at least one consumer is currently utilizing the data object, the method further comprising:

maintaining the data object stored within the memory of the cache based on the determination.

10. The computer-readable storage medium of claim 7, wherein determining whether a consumer of the data object within the cache is currently utilizing the data object includes interrogating a data structure stored within the cache that relates consumers to data objects stored within the cache.

11. The computer-readable storage medium of claim 7, wherein determining whether a consumer of the data object within the cache is currently utilizing the data object includes interrogating a data structure stored within the cache that tracks data objects currently associated with active consumers.

12. The computer-readable storage medium of claim 7, further comprising:

determining that a new consumer of the data object stored within memory of the cache is currently utilizing the data object; and

maintaining the data object stored within the memory of the cache based on the determination.

13. A cache management system, the system comprising:

a data transfer module that is configured to transfer one or more data objects into a memory component of a cache;

a tracking module located within the cache that is configured to track consumer information for each data object transferred into the memory component of the cache; and

a maintenance module that is configured to maintain the one or more data objects in the memory component of the cache based on the tracked consumer information.

14. The cache management system of claim 13, further comprising:

an action module that is configured to perform an action between two or more structures of a data object within the memory component of the cache.

15. The cache management system of claim 13, wherein the maintenance module is configured to delete a data object from the memory component of the cache when consumer information for the data object is no longer tracked by the tracking module.

16. The cache management system of claim 13, wherein the maintenance module is configured to maintain a data object within the memory component of the cache when the consumer information tracked by the tracking module indicates that the data object is associated with an active consumer of one or more data objects from the cache.

17. The cache management system of claim 13, wherein the tracking module is configured to monitor a table that relates data objects stored within the memory component of the cache to one or more active consumers of the data objects.

18. The cache management system of claim 13, wherein the tracking module is configured to track information identifying a consumer for each data object transferred into the memory component of the cache.

19. The cache management system of claim 13, wherein the tracking module is configured to track information identifying a consumer for each data object transferred into the memory component of the cache as well as information identifying a type of data object transferred into the memory of the cache.

20. The cache management system of claim 13, wherein the data transfer module is configured to read requested data objects of an archive file into the memory component of the cache.