Channel subsystem server time protocol commands

• US 8,972,606 B2
• Filed: 05/07/2013
• Issued: 03/03/2015
• Est. Priority Date: 01/31/2007
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Carlson, Scott M., Crabtree, Donald, Dahlen, Dennis J., Glendening, Beth A., Hack, Michel H. T., Sevigny, Denise M., Smith, Ronald M. Sr., Whitney, David E.
• Primary Examiner(s): SALL, EL HADJI MALICK
• Application Number:
  US13/888,506
• Publication Number:
  US 20130254478A1
• Time in Patent Office: 665 Days
• Field of Search: 709/200, 709/228, 709/246, 713/400, 713/500
• US Class Current: 709/246
• CPC Class Codes: G06F 15/167 using a common memory, e.g. mailbox
• CPC Class Codes: G06F 3/0607 by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
• CPC Class Codes: G06F 3/0659 Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0677 Optical disk device, e.g. CD-ROM, DVD
• CPC Class Codes: H04L 69/28 Timers or timing mechanisms used in protocols
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A protocol for communicating with the timing facility used in a data processing network to provide synchronization is provided via the execution of a machine instruction that accepts a plurality of commands. The interaction is provided through the use of message request blocks and their associated message response blocks. In this way timing parameters may be determined, modified and communicated. This makes it much easier for multiple servers or nodes in a data processing network to exist as a coordinated timing network and to thus more cooperatively operate on the larger yet identical data files.

Claims

1. A computer program product for obtaining information, said computer program product comprising:

a storage medium readable by a processor and storing instructions for execution by the processor for performing a method comprising;

obtaining a store machine instruction for accessing a first control block of memory and a second control block of memory, the first control block of memory being a request block and including a command code field to specify a store command, and the second control block of memory being a response block, the machine instruction being defined for computer execution according to a computer architecture; and

executing said machine instruction, said executing comprising;

accessing said command code field of said first control block to obtain said store command;

based on the store command, obtaining information relating to a Server Time Protocol (STP) facility; and

storing said information in the second control block.

2. The computer program product of claim 1, wherein the information indicates a state of the STP facility at a time specified by a date-timestamp field of the response block.

3. The computer program product of claim 1, wherein the store command comprises a store STP information command, and wherein the information includes at least one of a coordinated timing network identifier, timing status information, time control parameters, or current timing parameters used to perform clock synchronization.

4. The computer program product of claim 1, wherein the store command comprises a store STP information command, and wherein the information includes at least one of a time zone update scheduled indicator to indicate whether a time zone update is scheduled or a leap seconds offset update scheduled indicator to indicate whether a leap seconds offset update is scheduled.

5. The computer program product of claim 4, wherein at least one of the time zone update or the leap seconds offset update is specified by a store time zone information command.

6. The computer program product of claim 1, wherein the store command comprises a store STP information command, and wherein the information includes at least one of an indication of a stratum level at a time the store command was executed, an indication of a coordinated timing network type, an indication of a usable clock source or an indication of a timing state.

7. The computer program product of claim 1, wherein the store command comprises a store STP information fast command, and wherein the information includes at least one of a coordinated timing network identifier or timing state.

8. The computer program product of claim 1, wherein the store command comprises a store STP link information command, and wherein the information includes link information for one or more links of the computing environment that support STP message communication.

9. The computer program product of claim 1, wherein the store command comprises a store STP network node identifier command, and wherein the information includes node identification information for one or more nodes in the STP network.

10. The computer program product of claim 1, wherein the command comprises a store time zone information command, and wherein the information comprises at least one of time zone control parameters or leap-seconds offset information.

11. A computer system for obtaining information, said computer system comprising:

a memory; and

a processor in communications with the memory, wherein the computer system is configured to perform a method, said method comprising;

obtaining a store machine instruction for accessing a first control block of memory and a second control block of memory, the first control block of memory being a request block and including a command code field to specify a store command, and the second control block of memory being a response block, the machine instruction being defined for computer execution according to a computer architecture; and

executing said machine instruction, said executing comprising;

accessing said command code field of said first control block to obtain said store command;

based on the store command, obtaining information relating to a Server Time Protocol (STP) facility; and

storing said information in the second control block.

12. The computer system of claim 11, wherein the information indicates a state of the STP facility at a time specified by a date-timestamp field of the response block.

13. The computer system of claim 11, wherein the store command comprises a store STP information command, and wherein the information includes at least one of a coordinated timing network identifier, timing status information, time control parameters, or current timing parameters used to perform clock synchronization.

14. The computer system of claim 11, wherein the store command comprises a store STP information command, and wherein the information includes at least one of a time zone update scheduled indicator to indicate whether a time zone update is scheduled or a leap seconds offset update scheduled indicator to indicate whether a leap seconds offset update is scheduled.

15. The computer system of claim 14, wherein at least one of the time zone update or the leap seconds offset update is specified by a store time zone information command.

16. The computer system of claim 11, wherein the store command comprises a store STP information command, and wherein the information includes at least one of an indication of a stratum level at a time the store command was executed, an indication of a coordinated timing network type, an indication of a usable clock source or an indication of a timing state.

17. The computer system of claim 11, wherein the store command comprises a store STP information fast command, and wherein the information includes at least one of a coordinated timing network identifier or timing state.

18. The computer system of claim 11, wherein the store command comprises a store STP link information command, and wherein the information includes link information for one or more links of the computing environment that support STP message communication.

19. The computer system of claim 11, wherein the store command comprises a store STP network node identifier command, and wherein the information includes node identification information for one or more nodes in the STP network.

20. The computer system of claim 11, wherein the command comprises a store time zone information command, and wherein the information comprises at least one of time zone control parameters or leap-seconds offset information.