*Hi Mike and Schmuel - * * * Thank you very much for the clarification, and things are quite clear to me now. I will try and find my way into MVS control blocks, and maybe read a bit of the redbooks too, as you have recommended. Oh and by the ways Schmuel, the MFT manual I was referring to is * GC27-6939-10_MFT_Guide_R21.7_Mar72*. I procured a copy from the Internet.
I have written an article on TSO and ISPF on my blog at http://www.mainframes360.com/2012/11/tso-and-ispf.html. Of course, the I have articulated about time sharing at a very elementary level, to keep things simple. I hope the data presented are accurate. In case, you find something amiss, you can tell me. Thank you so much, Quasar. On Sun, Nov 18, 2012 at 8:28 PM, Shmuel Metz (Seymour J.) < [email protected]> wrote: > In > <CA+Myz1X=YFsEu43JaGc7W5Nss2Rfhs_ovr=swfe2cww0j6e...@mail.gmail.com>, > on 11/18/2012 > at 01:36 PM, Quasar Chunawala <[email protected]> said: > > >I have done some reading from the MFT manual. > > 1. Which MFT manual? > > 2. TSO started as an OS/360 option for MVT, not for MFT. > > >1. Every task(like a job-step) has a TCB, correct? > > The job-step has more than one task, each of which has a TCB. > > >Is the *ASCB* the same as *TCB*? > > No. There is one ASCB per address space, and an address space normally > has multiple tasks. > > >In the manual it states, that the READY queue is a chain of *TCB's *. > > In what manual? In MFT there is no ASCB, and in MVS there are multiple > ready queues, one of which is a queue of ready address spaces. > > >2. You write that, the TSO user address-space remains *swapped-in* > >atleast for the "*think-time*" period. The *think-time* is an > >externally-controlled parameter. Once the "think-time" elapses, > >the address-space is *logically swapped-out*? Does this apply > >today as well? > > The details have changed, but the basic concept is the same. > > -- > Shmuel (Seymour J.) Metz, SysProg and JOAT > Atid/2 <http://patriot.net/~shmuel> > We don't care. We don't have to care, we're Congress. > (S877: The Shut up and Eat Your spam act of 2003) > > ---------------------------------------------------------------------- > 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
