Roughly, and in an MVS context: Address space: a context for resolving virtual addresses. There is an address space for each batch job, started task, TSO session and similar units of work.
Data space: a specialized address space from which instructions are not executed. Subsystem: a body of code identified to MVS as a subsystem and providing service through the subsystem interface. Stated task: a job initiated by the START operator command rather than through the Initiator. In many cases the START is issued automatically shortly after IPL. Started tasks have identifiers starting with S or STC. Job; a unit or work. Batch jobs have identifiers starting with J or JOB. TSO: Time Sharing Option. Support for interactive units of work. Note that you can do Unix System Services work interactively without a TSO session. TSO sessions have identifiers starting with T or TSU. Process: a unit of scheduling for Unix. Depending on how the system is configured, multiple Unix processes may run in a single address space. There may b multiple threads within a process - in fact, the original name for threads as light-weight process. Enclave is a bit difficult describe; take a look at the Language Environment documentation for a start. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <[email protected]> on behalf of Peter Ten Eyck <[email protected]> Sent: Tuesday, November 6, 2018 1:59 PM To: [email protected] Subject: Ask the experts about running things For an inquisitive programmer... what is a good definition for each of the following? How do they relate to each other? Address space Data space Subsystem Started task Job TSU (TSO) Process Enclave Note: My explanation will fall short of what IBM-Main can come up with. ---------------------------------------------------------------------- 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
