NODE SELECTION FOR EXECUTING A JAVA APPLICATION AMONG A PLURALITY OF NODES

• US 20090125883A1
• Filed: 11/09/2007
• Published: 05/14/2009
• Est. Priority Date: 11/09/2007
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Darrington, David L., Barsness, Eric L., Santosuosso, John M., Peters, Amanda
• Granted Patent: US 8,127,273 B2
• Time in Patent Office: Days
• US Class Current: 717/119
• CPC Class Codes: G06F 9/5027 the resource being a machine, e.g. CPUs, Servers, Terminals

Abstract

Methods, apparatus, and products are disclosed for node selection for executing a Java application among a plurality of nodes connected together for data communications using a data communication network, the plurality of nodes also connected to a service node, that include: tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes; receiving, in the service node, an instruction to execute a Java application using the plurality of nodes; identifying, by the service node, Java classes utilized in executing the Java application; selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application; and configuring, by the service node, the Java application for execution on the selected node.

Claims

1. A method of node selection for executing a Java application among a plurality of nodes connected together for data communications using a data communication network, the plurality of nodes also connected to a service node, the method comprising:

tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes;

receiving, in the service node, an instruction to execute a Java application using the plurality of nodes;

identifying, by the service node, Java classes utilized in executing the Java application;

selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application; and

configuring, by the service node, the Java application for execution on the selected node.

2. The method of claim 1 wherein tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes further comprises receiving, by the service node from each of the plurality of nodes, a loaded class notification specifying the loaded Java classes currently loaded on that node.

3. The method of claim 1 wherein identifying, by the service node, Java classes utilized in executing the Java application further comprises identifying the Java classes utilized in executing the Java application in dependence upon historical runtime class loading information for the Java application.

4. The method of claim 1 wherein identifying, by the service node, Java classes utilized in executing the Java application further comprises analyzing the Java application to determine the Java classes utilized for the Java application.

5. The method of claim 1 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises selecting a node having already loaded at least a majority of the Java classes utilized in executing the Java application.

6. The method of claim 1 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises:

identifying a subset of the plurality of nodes that collectively has already loaded all of the Java classes utilized in executing the Java application; and

selecting a node included in the subset.

7. The method of claim 1 wherein the plurality of nodes are comprised in a parallel computer and connected together using a plurality of data communications networks, at least one of the plurality of data communications networks optimized for point to point operations, and at least one of the plurality of data communications networks optimized for collective operations.

11. The method of claim 1 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises:

identifying a subset of the plurality of nodes that collectively has already loaded all of the Java classes utilized in executing the Java application; and

selecting a node included in the subset.

8. A parallel computer capable of node selection for executing a Java application among a plurality of nodes, wherein the plurality of nodes are comprised in the parallel computer and connected together using a plurality of data communications networks, at least one of the plurality of data communications networks optimized for point to point operations, and at least one of the plurality of data communications networks optimized for collective operations, the plurality of nodes also connected to a service node of the parallel computer, the service node comprising a computer processor and computer memory operatively coupled to the computer processor, the computer memory for the execution node having disposed within it computer program instructions capable of:

tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes;

receiving, in the service node, an instruction to execute a Java application using the plurality of nodes;

identifying, by the service node, Java classes utilized in executing the Java application;

selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application; and

configuring, by the service node, the Java application for execution on the selected node.

9. The parallel computer of claim 8 wherein identifying, by the service node, Java classes utilized in executing the Java application further comprises identifying the Java classes utilized in executing the Java application in dependence upon historical runtime class loading information for the Java application.

10. The parallel computer of claim 8 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises selecting a node having already loaded at least a majority of the Java classes utilized in executing the Java application.

12. A computer program product for node selection for executing a Java application among a plurality of nodes connected together for data communications using a data communication network, the plurality of nodes also connected to a service node, the computer program product disposed upon a computer readable medium, the computer program product comprising computer program instructions capable of:

tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes;

receiving, in the service node, an instruction to execute a Java application using the plurality of nodes;

identifying, by the service node, Java classes utilized in executing the Java application;

selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application; and

configuring, by the service node, the Java application for execution on the selected node.

13. The computer program product of claim 12 wherein tracking, by the service node, loaded Java classes currently loaded on each of the plurality of nodes further comprises receiving, by the service node from each of the plurality of nodes, a loaded class notification specifying the loaded Java classes currently loaded on that node.

14. The computer program product of claim 12 wherein identifying, by the service node, Java classes utilized in executing the Java application further comprises

identifying the Java classes utilized in executing the Java application in dependence upon historical runtime class loading information for the Java application.

15. The computer program product of claim 12 wherein identifying, by the service node, Java classes utilized in executing the Java application further comprises analyzing the Java application to determine the Java classes utilized for the Java application.

16. The computer program product of claim 12 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises selecting a node having already loaded at least a majority of the Java classes utilized in executing the Java application.

17. The computer program product of claim 12 wherein selecting, by the service node, one of the plurality of nodes for executing the Java application in dependence upon the loaded Java classes and the Java classes utilized in executing the Java application further comprises:

identifying a subset of the plurality of nodes that collectively has already loaded all of the Java classes utilized in executing the Java application; and

selecting a node included in the subset.

18. The computer program product of claim 12 wherein the plurality of nodes are comprised in a parallel computer and connected together using a plurality of data communications networks, at least one of the plurality of data communications networks optimized for point to point operations, and at least one of the plurality of data communications networks optimized for collective operations.

19. The computer program product of claim 12 wherein the computer readable medium comprises a recordable medium.

20. The computer program product of claim 12 wherein the computer readable medium comprises a transmission medium.