IBM Comprehensive Guide to Coupling Facility, CF Table, and IMS Shared Queues Performance

Coupling Facility — CF Level of Support

CF Level Function

13Protocol used with fi ber channel expected to be more effi cient than ESCON

Helps lower Total Cost of Ownership (TCO) Only 2 cross site FCP links / ESS required for most workloads

Can provide better performance

Able to increase distance between sites while maintaining acceptable application performance

One protocol exchange vs. 2-3 with ESCO

1264-bit support for Coupling Facility, CF Duplexing Toleration for >15 LPAR ID on z990

Enhanced Storage Protect DB2 Performance Message Time Ordering

119672 G5/G6 CF Duplexing Toleration for >15 LPAR IDs on z990

10z900 GA2 support

9MQSeries® shared message queues WLM Multi-system Enclave Support Intelligent Resource Director** IC-3/ISC-3/ICB-3 Peer Mode**

8Dynamic ICF expansion into shared ICF pool Systems-Managed Rebuild

7Shared ICF partitions on server models DB2 Delete Name optimization

6ICB & IC TPF support

5DB2 cache structure duplexing

DB2 castout performance improvement Dynamic ICF expansion into shared CP pool*

4Performance optimization for IMS & VSAM RLS Dynamic CF Dispatching

Internal Coupling Facility*

IMS shared message queue extensions

3IMS shared message queue base

2DB2 performance

VSAM RLS

255 Connectors/1023 structures for IMS Batch DL1 (non-BMP)

1Dynamic Alter support

CICS temporary storage queues System Logger

Notes:

–G5 base CF level code is CF Level 6 and can be upgraded to CF Level 11

–G6 base CF level code is CF Level 8 and can be upgraded to CF Level 11

–z900 base CF level code is CF Level 9

–z800 and z990 base CF level code is CF Level 12

–Detailed information regarding CF Levels can be found in Coupling Facility Level (CF LEVEL) Considerations at ibm.com/s390/pso/cftable.html

*G3, G4, G5 and G6 only **zSeries required

Please note that although a particular back level machine may be updated to a more current CFCC level, NOT all the functions of that CFCC level may be able to run on that hardware platform, i.e., G3/G4 can be upgraded to CF Level 8 but it cannot use dynamic ICF expansion into shared ICF pool.

Fiber-Optic Cabling and System Connectivity

In the world of open systems and Storage Area Networks (SANs), the changing requirements for fi ber-optic cabling are directly related to the system hardware confi guration.

As industry-standard protocols and higher data rates con- tinue to be embraced in these environments, the fi ber-optic cabling options can become numerous and complex.

Today’s marketplace is evolving towards new Small Form Factor (SFF) fi ber-optic connectors, short wavelength (SX) and long wavelength (LX) laser transceivers, and increas- ing link speeds from one Gigabit per second (Gbps) to 10 Gbps. New industry-standard SFF fi ber optic connectors and transceivers are utilized on the zSeries ESCON and FICON Express features, on the ISC-3 feature, and on the zSeries ETR feature. These new features must coexist with the current infrastructure that utilizes a different “family” of fi ber-optic connectors and transceivers.

As a result of this complex and continually changing land- scape, IBM is providing you with multiple fi ber cabling services options to provide fl exibility in meeting your fi ber cabling needs.

IBM Network Integration and Deployment Services for zSeries fi ber cabling (zSeries fi ber cabling services) enables businesses to choose the zSeries confi guration that best matches their computing environment without having to worry about planning and implementing the

fiber optic cabling. By teaming with IBM, businesses can receive a world-class solution for their zSeries fi ber con- nectivity requirements, including consulting and project management, as well as the fi ber-optic jumper cables and installation to complete the zSeries integration.

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