IBM United States
Hardware Announcement 103-089
April 8, 2003

System-Managed Coupling Facility (CF) Structure Duplexing Readiness Review Available

 ENUS103-089.PDF (9KB)

Overview

System-Managed CF Structure Duplexing is now available exclusively through a readiness review. The readiness review is designed to provide customer guidance to help ensure successful use of the function. To enter the readiness review, a short questionnaire will need to be completed and sent to IBM. The questionnaire is available on Resource Link™ at:

Customers who want to begin using System-Managed CF Structure Duplexing must contact IBM through the readiness review to use the function.

Key Prerequisites

  • Any of these IBM eServers:
    • Model 9672 G5 or G6 with Driver 26 at the current service level and CFCC Level 11
    • Model 9672 R06 Coupling Facility with Driver 26 at the current service level and CFCC Level 11
    • zSeries™ 800 or 900 server with Driver 3G at the current service level and CFCC Level 12
    • z900 Model 100 Coupling Facility with Driver 3G at the current service level and CFCC level 12
    • z800 Model 0CF Coupling Facility with Driver 3G at the current service level and CFCC Level 12
  • z/OS™ V1.2, V1.3, or V1.4 with any APARs included in the CFDUPLEXING PSP Bucket
  • Bi-directional CF-to-CF connectivity via coupling links
  • Additional prerequisites are listed in the technical paper "System Managed CF Structure Duplexing" (GM13-0103)

Availability Date

April 8, 2003

Description

The architectural extensions to Parallel Sysplex® for the support of System-Managed duplexing of coupling facility structures for high availability are now available exclusively through a readiness review. All three structure types can be duplexed using this architecture:

  • Cache structures
  • List structures
  • Locking structures

Support for these extensions will be included in Coupling Facility Control Code (CFCC) Levels 11 and 12, and in z/OS V1.2, V1.3, and V1.4 with any additional APARS as listed in the CFDUPLEXING PSP bucket. Considerations for key exploiters of this new function are included in the technical paper, System-Managed CF Structure Duplexing (GM13-0103). Installing this software and microcode, and enabling this new function is designed to:

  • Provide the necessary base for highly-available coupling facility structure data through the redundancy of duplexing
  • Enhance use of Parallel Sysplex by reducing the complexity of CF structure recovery
  • Enable some installations to eliminate the requirement for stand-alone CFs in their Parallel Sysplex configurations

For those CF structures that support use of System-Managed CF Structure Duplexing, customers can dynamically enable or disable, selectively by structure, the use of System-Managed CF Structure Duplexing.

Customers interested in deploying System-Managed CF Structure Duplexing in their test, development, or production Parallel Sysplex will need to read the technical paper System-Managed CF Structure Duplexing (GM13-0103) and analyze their Parallel Sysplex environments to understand the performance and other considerations of using the function.

GM13-0103 is available at either:

After the customer analysis is completed, a short questionnaire will need to be completed and sent to IBM. The questionnaire is available on Resource Link at:

Access to the site will require a Resource Link ID and password. If the customer does not have an ID, he may self-register with Resource Link at:

Once this questionnaire is submitted to IBM, IBM will determine if the planned use requires customer consultation with lab personnel. If a consultation is required, the customer will be contacted by IBM to discuss the proposed use. As part of the consultation, the lab will provide guidance and recommendations specifically tailored to the planned customer usage. After completing the consultation, or if no consultation is required, the customer will be sent instructions on how to enable the use of System-Managed CF Structure Duplexing.

Trademarks

 
Resource Link, zSeries, and z/OS are trademarks of International Business Machines Corporation in the United States or other countries or both.
 
Parallel Sysplex is a registered trademark of International Business Machines Corporation in the United States or other countries or both.
 
Other company, product, and service names may be trademarks or service marks of others.