Mark Neal wrote:
Has anybody given much thought to the hidden benefits of migrating from a
MP3000 to a Z9 BC?
I currently have a one processor MP3000 7060-H30 that rarely needs more
than 40% of the MP3000 cpu capacity. The Z9 BC A01 configuration that I
am considering has only one CP, but it also has a SAP for I/O and QDIO for
TCPIP offload. Single TCB tasks like CICS are not an issue in our
environment, so I expect the Z9 A01 to meet our cpu capacity requirements.
Also, I will be moving to a DS6800 disk subsystem on FICON.
I expect the SAP, QDIO, and DS6800 will greatly improve my overall
throughput, but they are difficult to quantify.
I expect I/O and TCPIP traffic to fly through the system. And I expect
the MP3000 cycles that are used for I/O and TCPIP will now be available
for other tasks.
Have I missed anything obvious? Any other ideas?
I'd start with disadvantage: you already have MP3K, and z9BC need to be
paid. Some of the features are extra paid. YMMV - total price depends on
negotiation process.
OK, now the advantages:
1. 64-bit, current version of z/OS supported.
2. More memory.
3. Much more channels possible.
4. Faster channels. Ficon 2/4Gbps, OSA 1/10Gbps.
5. Specialized channels (chpids): OSN, IQD, ICP, CFP, CBP.
6. Specialized engines: ICF, IFL, zAAP, zIIP.
7. Real coupling facility. For limited testing purposes it does *not*
require ICF purchase. For regular usage ICF is strongly recommended.
8. Crypto: CPACF, optional CEX2C cards. More features, better performance.
9. Much more LPARs.
10. Costs of h/w maintenance (YMMV), spare parts availability.
11. More concurrency during H/W maintenance/upgrade, etc.
12. Better apperance <g>
As general, your mileage may vary. The advantages are useful only when
you need them or *may* need in a future.
--
Radoslaw Skorupka
Lodz, Poland
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