We use JZOS. There are some advantages. For example, everything is offloaded to 
a zIIP. If you use BPXBATCH every time you write a log message to STDOUT it 
will context switch back to a GP. There are also important features for started 
tasks such as STOP and MODIFY commands. 

> On 15 Apr 2025, at 17:40, Colin Paice 
> <[email protected]> wrote:
> 
> Does anyone have any experience of using jzos over Unix Services?
> 
> I've used it in the past and it worked fine.  I wonder why it is not more
> generally used (eg by Liberty, zOSMF, Zowe etc).
> 
> Does it have better performance?
> 
> Colin
> 
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