Cache isolation model

• US 20060248131A1
• Filed: 04/29/2005
• Published: 11/02/2006
• Est. Priority Date: 04/29/2005
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Marwinski, Dirk, Petev, Petio G.
• Granted Patent: US 7,581,066 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores

Abstract

One embodiment of the invention employs techniques for providing isolation for exclusivity of operation. Isolation may exist between different application and/or different threads or virtual machines of the same application. In one embodiment, using a lock helps to ensure that operations are executed exclusive of each other.

Claims

1. A system of providing isolation, comprising:

a template file;

an offline deploy tool to transform information regarding a service into a configuration structure using the template file; and

an cache manager to transform information regarding an application into a configuration structure using the template file and to read the service and application configuration structures, wherein the cache manager dynamically allocates cache regions based on the configuration structures; and

a locker construct, the cache manager to employ the locker construct to ensure that each operation is executed exclusively.

2. The system as in claim 1, wherein the template file further comprises definable parameters selected from the group consisting of:

count thresholds, size thresholds, scope, storage plug-in, eviction plug-in, invalidation, logging, messaging type, and relative weight.

3. The system as in claim 2, wherein the template further includes a principal, the principal to identify a particular region and ensure cache isolation by having cache regions clearly defined by principal name.

4. The system as in claim 3, further comprising:

a kernel to provide information about the service to the offline deploy tool.

5. The system as in claim 4, further comprising:

a deploy tool to gather information from an application container and provide the information to the cache management service.

6. The system as in claim 5, further comprising:

a graphical user interface to provide user access the configuration structures.

7. A method, comprising:

generating a specific cache region configuration structure for a service based on a principal name, wherein the configuration structure is based on a pre-defined template including the principal name;

generating a specific cache region configuration structure for an application based on a principal name, wherein the configuration structure is based on the pre-defined template including the principal name;

initializing particular cache regions based on the configuration structures of the services and applications; and

maintaining cache isolation through the use of a locker construct when recreating an object in cache.

8. The method as in claim 7, wherein the configuration structure comprises a group of property sheets for each region of cache.

9. The method as in claim 8, wherein generating a configuration structure for a cache region further comprises:

transforming information from a kernel regarding the service into a property sheet.

10. The method as in claim 9, wherein generating a configuration structure for a cache region further comprises:

transforming information from an application archive regarding the cache region into a property sheet.

11. The method as in claim 10, wherein the pre-defined template is an XML document.

12. The method as in claim 7, further comprising:

re-initializing cache regions dynamically upon the stopping of a service and/or application.

13. The method as in claim 7, further comprising:

re-initializing cache regions dynamically upon the starting of a service and/or application.

14. The method as in claim 7, wherein initializing particular cache regions based on the configuration structures of the services and applications further comprises:

apportioning a cache region based on a relative weight schema.

15. The method as in claim 14, wherein the relative weight schema comprises:

multiplying the total cache space available by the relative normalized weight of the service and/or application; and

dividing by the sum of all relative normalized weights used in the system.

16. An article of manufacture including program code which, when executed by a machine, causes the machine to perform the operations of:

generating a cache region configuration structure for a service, wherein the configuration structure is based on a pre-defined template;

generating a cache region configuration structure for an application, wherein the configuration structure is based on the pre-defined template;

initializing particular cache regions based on the configuration structures of the services and applications; and

maintaining cache isolation through the use of a locker construct when recreating an object in cache.

17. The article of manufacture as in claim 16 comprising additional program code to cause said machine to perform the operations of:

re-initializing cache regions dynamically upon the stopping and/or starting of a service and/or application.

18. The article of manufacture as in claim 16 comprising additional program code to cause said machine to perform the operations of:

apportioning a cache region based on a relative weight schema.