Episode 36 "Telum Like It Is"

What’s New

• z/OS dependencies moved from Semeru 17 to 21. EOS for Semeru 11 is 30 Nov 2025.
• Manual of the Moment: z/OS 3.1 Planning for Installation refresh, Software Dependencies section

Mainframe - Position z/OS for IBM z17

• z/OS V2.4 and higher is supported on IBM z17. Use SMP/E FIXCATs to find the necessary service.
• z/OS Sysplex requirements for coexistence is z15, z16, and z17.
• Exploitation for z17 in z/OS includes: Workload level sustainability and power consumption, Workfload classification pricing, new CL6 link technology, BCPii and HMC hardened security, CF Level 26, and more.

Mainframe Also - Preview of z/OS 3.2

• z/OS 3.2 will IPL on z15 and higher servers. Planned GA is 3Q2025.
• Some new functions previewed, but stay tuned for further announcements with more complete functions.
• Highlights: new REST APIs for doing installation of service updates, support for direct encryption to tape, new z/OSMF Storage Management interface, RACF certificate support for multiple altnames, and more.

Performance - IBM z17 highlights

• Telum 2 processor has the 2nd generation on-chip AI accelerator, with 8-bit integer (INT8) and 16-bit floating point (FP16) datatypes for more thruput.
• 5nm (from 7nm), with clock speeed of 5.5 GHz (from 5.2).
• DPU has 4 port cards (from 2), with energy consumption reduction. DPU accessible from other chips and DCMs.
• 1 to 4 processor drawers. 4-drawer models are Max183 and Max 208.
• Memory 64 TB (from 40).
• Measurements with new Channel Measurement Groups 4 and 5, with SMF 73 support.

Topics

• Martin and Marna discuss how they prepared materials for IBM z17, with the Upgrade Workflow and Redbooks.

On the blog

• Marna's blog
• Martin's blogs

  So It Goes