Multi-phase commit processing for creation and deletion of managed objects

• US 5,491,822 A
• Filed: 12/30/1993
• Issued: 02/13/1996
• Est. Priority Date: 12/30/1993
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Nielsen, Robert L., Reder, Paul J., Goodwin, Jeremy P., Allen, Wade C., Toltzman, Douglas
• Primary Examiner(s): Oberley, Alvin E.
• Assistant Examiner(s): Chavis, John Q.
• Application Number:
  US08/175,904
• Time in Patent Office: 775 Days
• Field of Search: 395/650, 395/700
• US Class Current: 719/316
• CPC Class Codes: G06F 9/466 Transaction processing

Abstract

Managed Object Instances (MOIs) in a network of OSI computing systems are created, or deleted, without disrupting their interaction with other managed object instances. This is accomplished by a multi-phase commit process operation where in the first phase, a create or delete request is verified, and the CMIP platform places the created or deleted MOI on a pending list in the CMIP platform, along with information identifying the location of the MOI in a hierarchy of MOIs. In the second phase, the object being created or deleted is asked to accept, or reject, the request. The object responds saying that it accepts or rejects the request. If the request is acceptable, the CMIP platform finishes the object'"'"'s connection to the tree hierarchy, or disconnects the object from the tree. Then the CMIP platform sends back a message to the object to acknowledge the creation of the object, or to tell the object to delete itself. Finally, the CMIP platform sends a request completion message to the manager.

Claims

1. In a computing system having manager applications (manager) that manage Managed Object Instances (MOI) in agent applications (agent) running on top of a management services platform, a method for multi-phase commit processing of requests by a manager application to a agent application, the requests identifying action to be taken on a requested MOI at the agent application, said method comprising the steps of:

registering the request for the requested MOI as an action pending entry on a pending list in said platform;

sending the request to the agent to determine whether the MOI accepts or rejects the request;

determining whether the request is acceptable;

if the request is acceptable, changing the pending action entry to a final action entry for the requested MOI; and

sending a message to the requested MOI to execute the request; and

executing the request.

2. The method of claim 1 wherein the request is a create or delete request whereby the manager applications create and delete Managed Object Instances (MOI) in agent applications, said method further comprising the steps of:

verifying the create or delete request at the platform before said registering step;

said registering step registers a create or delete request as a pending node in a tree hierarchy of nodes where each node represents an MOI and the tree indicates how the nodes operatively reference each other;

marking the pending node as a final node if the create or delete request is acceptable;

for each final node, executing a connection of the node to the tree for the MOI created by the request or deleting the MOI to be deleted by the request, and

sending a response to the manager indicating whether or not the request was completed.

3. In a computing system having a manager application that creates and deletes managed object instances (MOIs) within a plurality of MOIs contained in an agent application running on a management platform, said MOIs organized in an MOI hierarchy mapped as an MOI tree, a computer implemented method for multi-phase commit processing of a create MOI request sent by the manager to the agent comprising the computer implemented steps of:

receiving the create MOI request within the platform;

validating the create request within the platform by checking the MOI to be created against the MOI hierarchy;

registering the requested MOI within the platform as a pending instance node in the MOI tree;

sending a create request for the requested MOI from the platform to the agent,

testing at the agent whether the create request is acceptable;

deleting the pending instance node from the MOI tree if the agent indicates the create request is unacceptable;

finish connecting the pending instance node to the MOI tree, if the agent indicates the create request is acceptable, whereby the MOI becomes operative in the MOI hierarchy.

4. The method of claim 3, wherein the registering step includes the steps of:

allocating a pending instance node for the requested MOI;

attaching the pending instance node to the MOI tree with a pointer that points to a parent node for the pending instance node.

5. The method of claim 3, further comprising the steps of:

said testing step testing whether the create request is valid;

said deleting step deleting the pending instance node at the platform if the request is not valid;

said testing step testing whether the create request if valid also includes acceptable attributes;

changing the attributes of the create request to acceptable attributes and indicating the create request is acceptable.

6. The method of claim 3 further comprising the step of:

sending a message to the manager indicating whether the requested MOI was created.

7. In a computing system having a manager application that creates and deletes managed object instances (MOIs) within a plurality of MOIs contained in an agent application running on a management platform, said MOIs organized in an MOI hierarchy mapped as an MOI tree, a computer implemented method for multi-phase commit processing of a delete MOI request sent by the manager to the agent comprising the computer implemented steps of:

receiving at the platform a delete MOI request from the manager;

validating the delete request within the platform;

registering each MOI within the scope of the delete request in a pending delete list;

sending a delete request to each MOI in the pending delete list;

determining whether each MOI receiving a delete request is deletable;

generating a final delete list containing only those MOIs on the pending delete list that said determining step determines to be deletable;

deleting the MOIs on the final delete list.

8. The method of claim 7, further including the step of:

sending a message to the manager to inform the manager of whether any MOIs were deleted.

9. The method of claim 7, wherein the pending delete list delete includes "child" MOIs that are dependent in the MOI tree from "parent" MOIs within the scope of the delete request.

10. The method of claim 9, wherein said determining step comprises the steps of:

determining if each child MOI is deletable;

determining if the parent MOI of a deletable child MOI is deletable;

identifying both the parent MOI and the child MOI as deletable only if both are deletable.

11. In an interconnected computing system having a manager application (manager) in a first computing system and an agent application (agent) in a second computing system and wherein the manager creates and deletes managed object instances (MOIs) in the agent via a common management information protocol (CMIP) platform, apparatus for multi-phase commit processing of a create or delete MOI request sent by the manager to the agent, said apparatus comprising:

receiving means in the CMIP platform for receiving and validating a create or delete MOI request from the manager to thereby generate validated requests;

means responsive to the receiving means for adding validated requests to a pending request list in the CMIP platform;

means for sending a validated request from the CMIP platform to the agent;

means at the agent for testing whether the validated request is acceptable;

means responsive to said testing means for marking pending requests on the pending request list in the CMIP platform as final requests if the validated request is acceptable;

means responsive to the final request list in the CMIP platform for executing each final request at the agent.

12. The apparatus of claim 11 further comprising:

means for sending a message to the manager to tell the manager which MOIs were created or deleted.

13. The apparatus of claim 11 further comprising:

means for creating a modified MOI if the agent application modifies a validated create request.

14. The apparatus of claim 11 further comprising:

means for adding "child" MOIs of "parent" MOIs in the delete request to the pending delete list.

15. The apparatus of claim 14 wherein:

said marking means removes from the final request list all delete requests for "parent" MOIs of "child" MOIs that may not be deleted.