Object persistency

• US 8,589,621 B2
• Filed: 07/27/2011
• Issued: 11/19/2013
• Est. Priority Date: 10/29/2010
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Wang, Qing F., Wang, Yun
• Primary Examiner(s): Alsip, Michael
• Application Number:
  US13/192,347
• Publication Number:
  US 20120110254A1
• Time in Patent Office: 846 Days
• Field of Search: None
• US Class Current: 711/104
• CPC Class Codes: G06F 9/4493 Object persistence

Abstract

There is provided a method and computer system for object persistency that includes: running a program; storing an object of the program into a random access memory in response to determining that the object is a non-persistent object; and storing the object into a phase change memory in response to determining that the object is a persistent object. The method and computer system of the present disclosure do not need separate persistency layers, such that the programming model is light weighted, the persistency of object data is more simple and fast, and implicit transaction process is supported, thereby a great deal of development and runtime costs are saved.

Claims

1. A method for object persistency, comprising:

running, using a processor of a computer system, a program;

setting a transaction indicator to indicate whether an object of the running program belongs to a transaction process;

in response to determining that the object is a non-persistent object and that the transaction indicator indicates that the object does not belong to a transaction process,

moving the object into a random access memory; and

performing a clearing process; and

in response to determining that the object is a persistent object, storing the object into a phase change memory.

2. The method according to claim 1, further comprising:

setting a persistency indicator to indicate whether the object is a persistent object.

3. The method according to claim 2, further comprising:

in response to determining that the transaction indicator indicates that the object does not belong to a transaction process and the persistency indicator indicates that the object is a persistent object,

moving the object to the phase change memory; and

performing a conflict detection.

4. The method according to claim 2, wherein the object is copied to the random access memory and further comprising:

in response to determining that the transaction indicator indicates that the object belongs to a transaction process, performing an update process.

5. The method according to claim 4, wherein the persistency indicator indicates one of that the object is a persistent object and that the object is a non-persistent object.

6. The method according to claim 1, wherein the running program comprises an object-oriented application.

7. The method according to claim 1, wherein the running program comprises a virtual machine.

8. A computer system, comprising:

a processor that processes an object of a running program;

a transaction indicator that is set to indicate whether the object belongs to a transaction process;

a random access memory coupled to the processor, wherein the object is moved into the random access memory in response to the processor determining that the object is a non-persistent object and that the transaction indicator indicates that the object does not belong to a transaction process;

a phase change memory coupled to the processor, wherein the phase change memory stores the object in response to the processor determining that the object is a persistent object; and

an object collector that moves the object to the random access memory and performs a clearing process.

9. The computer system according to claim 8, wherein a persistency indicator is set to indicate whether the object is a persistent object.

10. The computer system according to claim 9, wherein the object collector that moves the object to the phase change memory and performs a conflict detection in response to determining that the transaction indicator indicates that the object does not belong to a transaction process and the persistency indicator indicates that the object is a persistent object.

11. The computer system according to claim 9, wherein the processor copies the object to the random access memory and performs an update process in response to determining that the transaction indicator indicates that the object belongs to a transaction process.

12. The computer system according to claim 11, wherein the persistency indicator indicates one of that the object is a persistent object and that the object is a non-persistent object.

13. The computer system according to claim 8, wherein the running program comprises an object-oriented application.

14. The computer system according to claim 8, wherein the running program comprises a virtual machine.