Take a look at https://www.ibm.com/docs/en/zos/2.4.0?topic=requirements-processor-storage-amount
On Thu, Apr 15, 2021 at 8:37 PM Radoslaw Skorupka <[email protected]> wrote: > I'm trying to arrange my knowledge about CPU and RAM limits. > > Example: current z/OS has limit up to 4 TB of memory. Older versions > (down to 1.8) also had that limit, but older machines had limit for LPAR > memory - up to 1 TB. This time it is not so easy to say what generation, > because LPAR limitation depend on I/O cage. In short, old cards like > FICON Express8 (non-S) means old I/O Cage, means up to 1 TB per LPAR. > Obviously z9 had lower limit because it had less memory (512 GB max). > What is current limit of LPAR memory? It is at least 16 TB (SSC support > it). > Things get more unclear with CPU (CP, zIIP, zAAP) limits. Nowadays it is > possible to run z/OS with 190 CPs defined to LPAR. In the past there > were limitations. And since SMT there is another limitation for SMT mode. > > Now questions: > What is current memory limit of LPAR? Is it just all available memory? > What about z/OS pre-1.8? Was the limit of 128 GB the same for all > versions 1.1-1.7? > What are CPU limits for older z/OS? > Is there any table, documentation, or presentation? > What is CFCC memory limit? (CPU is limited to 16 engines). > What about other systems (z/VSE, z/VM, z/TPF, Linux) - are the limits > documented anywhere? > > -- > Radoslaw Skorupka > (looking for new job) > Lodz, Poland > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
