Method and apparatus for a non-disruptive recovery of a single partition in a multipartitioned data processing system

• US 7,085,860 B2
• Filed: 01/11/2002
• Issued: 08/01/2006
• Est. Priority Date: 01/11/2002
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Frazier, Giles R., Dugan, Robert J.
• Primary Examiner(s): Fleming, Fritz
• Assistant Examiner(s): MARTINEZ, DAVID E
• Application Number:
  US10/043,489
• Publication Number:
  US 20030135620A1
• Time in Patent Office: 1,663 Days
• Field of Search: 710/5, 710/19, 710/36, 709/223, 709225-229, 709/245, 709/250
• US Class Current: 710/36
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

A method, apparatus and program product for the non-disruptive recovery of a single partition in a multipartitioned data processing system. A server contains multiple partitions connected to a single channel adapter which is used to send data and commands to a fabric. A request is sent by the adapter to the well-known address for the fabric. The request includes an identification of the port associated with the partition to be removed. Upon receipt of the request, the fabric removes all resources associated with the port being logged out without affecting ongoing operations in other partitions.

Claims

1. In a data processing network having a server with multiple partitions, a fabric, and a channel adapter communicating between the partitions and the fabric wherein each partition has an assigned address, a method of non-disruptively removing an assigned address comprising:

sending a logout command from the channel adapter to the fabric, the logout command including an address to be removed;

checking the address to be removed with a table of active addresses to determine if the address to be removed is an active address, the table of active addresses containing addresses generated and assigned to partitions by the fabric in response to address assignment requests from the partitions;

changing the status of the address to be removed from active to inactive, thereby allowing the inactivated address to be reassigned by the fabric to the same or another partition that requests an address assignment; and

sending an accept response from the fabric to the channel adapter indicating that the address to be removed has been removed.

2. The method of claim 1 wherein the said table associates a partition identification with the address to be removed, said method further comprising;

including a partition identification in said logout command;

checking the partition identification from said logout command with the partition identification in said table associated with the address to be removed; and

sending said accept response only when both the address and the partition identification in the logout command match with the address and associated partition identification in said table.

3. The method of claim 1 wherein said logout command includes an address of the source of the logout command, and the address to be removed is the same as the source address of the logout command.

4. In a data processing network having a server with multiple partitions, a fabric, and a channel adapter communicating between the partitions and the fabric wherein each partition has an assigned address, a apparatus for non-disruptively removing an assigned address comprising:

means for sending a logout command from the channel adapter to the fabric, the logout command including an address to be removed;

means for checking the address to be removed with a table of active addresses to determine if the address to be removed is an active address, the table of active addresses containing addresses generated and assigned to partitions by the fabric in response to address assignment requests from the partitions;

means for changing the status of the address to be removed from active to inactive, thereby allowing the inactivated address to be reassigned by the fabric to the same or another partition that requests an address assignment and means for sending an accept response from the fabric to the channel adapter indicating that the address to be removed has been removed.

5. The apparatus of claim 4 wherein the said table associates a partition identification with the address to be removed, said apparatus further comprising;

means for including a partition identification in said logout command;

means for checking the partition identification from said logout command with the partition identification in said table associated with the address to be removed; and

means for sending said accept response only when both the address and the partition identification in the logout command match with the address and associated partition identification in said table.

6. The apparatus of claim 4 wherein said logout command includes an address of the source of the logout command, and the address to be removed in the same as the source address of the logout command.

7. A data processing system comprising:

a server having multiple partitions;

a fabric;

a channel adapter communicating between the partitions and the fabric via a channel adapter wherein each partition has an address that was assigned to it by the fabric in response to the partition'"'"'s request for an address assignment;

said channel adapter sending a logout command to the fabric, the logout command including an address to be removed;

a table in said fabric for registering addresses that the fabric generated and assigned to said channel adapter, said fabric checking the address to be removed with said table to determine if the address to be removed is an active address;

said fabric changing the status of the address to be removed from active to inactive, thereby allowing the inactivated address to be reassigned by the fabric to the same or another partition that requests an address assignment; and

said fabric sending an accept response to the channel adapter indicating that the address to be removed has been removed.

8. The data processing system of claim 7 wherein the said table associates a partition identification with the address to be removed, said data processing system further comprising;

said channel adapter including a partition identification in said logout command;

said fabric checking the partition identification from said logout command with the partition identification in said table associated with the address to be removed; and

said fabric sending said accept response only when both the address and the partition identification in the logout command match with the address and associated partition identification in said table.

9. The data processing system of claim 7 wherein said logout command includes an address of the source of the logout command, and the address to be removed in the same as the source address of the logout command.

10. A program product usable with a data processing network having a server with multiple partitions, a fabric, and a channel adapter communicating between the partitions and the fabric wherein each partition has an assigned address, said program product comprising:

a computer readable medium having recorded thereon computer readable program code performing a method of non-disruptively removing an assigned address comprising;

sending a logout command from the channel adapter to the fabric, the logout command including an address to be removed;

checking the address to be removed with a table of active addresses to determine if the address to be removed is an active address, the table of active addresses containing addresses generated and assigned to partitions by the fabric in response to address assignment requests from the partitions;

changing the status of the address to be removed from active to inactive, thereby allowing the inactivated address to be reassigned by the fabric to the same or another partition that requests an address assignment; and

sending an accept response from the fabric to the channel adapter indicating that the address to be removed has been removed.

11. The program product of claim 10 wherein the said table associates a partition identification with the address to be removed, said method further comprising;

including a partition identification in said logout command;

checking the partition identification from said logout command with the partition identification in said table associated with the address to be removed; and

sending said accept response only when both the address and the partition identification in the logout command match with the address and associated partition identification in said table.

12. The program product of claim 10 wherein said logout command includes an address of the source of the logout command, and the address to be removed in the same as the source address of the logout command.