>Correct. But if the majority of HLASM users simply want to offload
>MVS development work to zLinux, they wouldn't care about ELF.
>If there's any planned movement of MVS/VM/VSE-based code to zLinux,
>then ELF object would certainly be important.
My personal guess is that Linux HLASM will be of keen interest for Linux
development, first and foremost.
By the way, there was an earlier question about IFLs versus CPs. There
are indeed many customers running Linux on CPs (without any IFLs or in
combination with IFLs). It's fairly common among z800 and z890 shops,
especially those with some sort of workload-oriented software licensing
and softcapped LPARs. Linux software licensing is generally per-processor
based (flat rate), so a CP would count the same as an IFL for those
purposes.
CPs (hardware) cost more than IFLs, but there again that's not always a
defining factor, particularly if the Linux work occupies a fraction of a
CP. Also, on z800/z890 there are four engines available, and some shops
like to run with all four as CPs ("kneecapped" or not) for SMP-friendly
workloads, so there's no room for an IFL (or zAAP) in those cases.
I've also run into customers that define CPs to z/VM then vary them on/off
as Linux workload demands (manually or semi-dynamically). The CPs also
run z/OS (or z/VSE or...), again according to demand. The CPs can handle
either workload flexibly. Another example is mixed VM/CMS and Linux
workload. (You're obliged to have CPs for "classic" z/VM workloads.)
And then there are disaster situations where you go all CPs (if you
want/need) to keep the business afloat.
Net net: Linux on CPs is fairly common.
- - - - -
Timothy F. Sipples
Consulting Enterprise Software Architect, z9/zSeries
IBM Japan, Ltd.
E-Mail: [EMAIL PROTECTED]
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