I wouldn't think that there would be much of a performance issue between using:
- the "java" shell command launcher - the JZOS batch launcher - a custom Java JVM launcher. They would all use the JVM launcher API to start the JVM and kick off a class method. The choice comes down to the features and interface that your product wants. I had not considered that messages written by the JVM to it's stdout would be piped through another process (BPXBATCH) that would not run on zIIP. Seems like minor stuff to me, but I guess that it might not always be. I'm actually surprised to hear that the JZOS batch launcher load module is itself zIIP enabled. I know that the JVM and the JZOS toolkit native library DLLs are. BTW: The JZOS Console support is not actually part of the JZOS Batch Launcher. There is a com.ibm.jzos.MvsConsole class in the JZOS Toolkit. If you invoke the startMvsCommandListener() static method, you can have console support in any z/OS Java application. The JZOS Batch launcher just starts this after initializing the JVM, although that can be disabled with an environment variable. The MvsConsole class also allows you to customize a callback so that you can have whatever command language you want. Kirk Wolf Dovetailed Technologies https://coztoolkit.com On Tue, Apr 15, 2025, at 9:09 AM, David Crayford wrote: > 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 > > > > ---------------------------------------------------------------------- > > 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 > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
