Restarting a coupling facility command using a token from another coupling facility command

• US 6,813,726 B2
• Filed: 10/01/2001
• Issued: 11/02/2004
• Est. Priority Date: 10/01/2001
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Dahlen, Dennis J., Jordan, Michael J., Surman, David H., Elko, David A., Wilkinson, Wendell W.
• Primary Examiner(s): Iqbal, Nadeem
• Application Number:
  US09/968,729
• Publication Number:
  US 20030088806A1
• Time in Patent Office: 1,128 Days
• Field of Search: 714/6, 714/10, 714/11, 714/12, 714/13, 714/43, 714/47, 709/201, 709/203, 709/106, 709/107, 709/248, 709/249
• US Class Current: 714/6.11
• CPC Class Codes: G06F 11/1415 at system level
• CPC Class Codes: G06F 11/2071 using a plurality of controllers

Abstract

Restarting of coupling facility commands. A restart token is obtained from one coupling facility command and used to restart another coupling facility command. The command from which the restart token is obtained is a different command from the command being restarted. In one example, the command being restarted is a duplexed command.

Claims

1. A method of restarting coupling facility commands, said method comprising:

obtaining from one coupling facility command a token to be used in restarting another coupling facility command, said another coupling facility command being different from said one coupling facility command; and

using said token to restart said another coupling facility command.

2. The method of claim 1, wherein said one coupling facility command comprises a read list command and said another coupling facility command comprises a delete list command.

3. The method of claim 1, wherein said one coupling facility command comprises a read list set command and said another coupling facility command comprises a delete list set command.

4. The method of claim 1, wherein said one coupling facility command comprises a read directory command and said another coupling facility command comprises an invalidate name command.

5. The method of claim 1, wherein the one coupling facility command is a command resulting from a conversion of the another coupling facility command into a plurality of commands, one of which is the one coupling facility command.

6. The method of claim 1, wherein said another coupling facility command is a duplexed command.

7. The method of claim 1, wherein said another coupling facility command begins as a duplexed command, but completes as a simplex command.

8. A system of restarting coupling facility commands, said system comprising:

means for obtaining from one coupling facility command a token to be used in restarting another coupling facility command, said another coupling facility command being different from said one coupling facility command; and

means for using said token to restart said another coupling facility command.

9. The system of claim 8, wherein said one coupling facility command comprises a read list command and said another coupling facility command comprises a delete list command.

10. The system of claim 8, wherein said one coupling facility command comprises a read list set command and said another coupling facility command comprises a delete list set command.

11. The system of claim 8, wherein said one coupling facility command comprises a read directory command and said another coupling facility command comprises an invalidate name command.

12. The system of claim 8, wherein the one coupling facility command is a command resulting from a conversion of the another coupling facility command into a plurality of commands, one of which is the one coupling facility command.

13. The system of claim 8, wherein said another coupling facility command is a duplexed command.

14. The system of claim 8, wherein said another coupling facility command begins as a duplexed command, but completes as a simplex command.

15. A system of restarting coupling facility commands, said system comprising:

a token obtained from one coupling facility command to be used in restarting another coupling facility command, said another coupling facility command being different from said one coupling facility command; and

a computing unit to use said token to restart said another coupling facility command.

16. At least one program storage device readable by a machine tangibly embodying at least one program of instructions executable by the machine to perform a method of restarting coupling facility commands, said method comprising:

obtaining from one coupling facility command a token to be used in restarting another coupling facility command, said another coupling facility command being different from said one coupling facility command; and

using said token to restart said another coupling facility command.

17. The at least one program storage device of claim 16, wherein said one coupling facility command comprises a read list command and said another coupling facility command comprises a delete list command.

18. The at least one program storage device of claim 16, wherein said one coupling facility command comprises a read list set command and said another coupling facility command comprises a delete list set command.

19. The at least one program storage device of claim 16, wherein said one coupling facility command comprises a read directory command and said another coupling facility command comprises an invalidate name command.

20. The at least one program storage device of claim 16, wherein the one coupling facility command is a command resulting from a conversion of the another coupling facility command into a plurality of commands, one of which is the one coupling facility command.

21. The at least one program storage device of claim 16, wherein said another coupling facility command is a duplexed command.

22. The at least one program storage device of claim 16, wherein said another coupling facility command begins as a duplexed command, but completes as a simplex command.