Re: OS/400 topics

   OS/400 supports batch operations, interactive operations, web operations,
   menu driven operations, data queue operations, FTP, and various other
   alternatives.  You can open a spread sheet and see the latest data from an
   OS/400 data base.

   It supports many kinds of scheduling.  GO CMDSCDE is the most basic of
   those, and free to anyone who purchases the OS.

   GO MAJOR is a great menu to start with.
   Remember that the F1 key is universal help support, assuming you are on a
   system where the owners opted to load the help support.

   OS/400 is an extremely sophisticated mainstream OS used by hundreds of
   thousands of enterprises world wide, and in fact IBM has recently upgraded
   it to new naming that replaces it with something else.

   It is scalable across all imaginable sizes of enterprises.
   It can handle terrabytes of data no sweat.
   It can support hundreds of thousands of concurrent users no sweat.
   It can operate for many years without need of tech support.
   Operations Cost can't be beat except at the very low end in terms of size
   and application mix.

   All of the info you ask for is available by attending the classes offered
   by IBM and 3rd party outfits to people who are certified employees of
   corporate customers that have OS/400 systems.  Some of the info is also
   available other ways.

   IBM has thousands of manuals on OS/400 on-line, which can be purchased, or
   downloaded for free to the media of your choice.

   Since OS/400 gets enhancements and upgrades of various kinds every 6
   months or so, for the past gazillion years, you need to know which version
   of the documentation is most relevant.

   It is very rare that anyone needs all the info you ask for.
   End users can do their job efficiently without knowing this stuff.
   Programmers can do their job efficiently without using it.
   OS/400 comes with DB2 which does not need any data base administrator.
   Security officers don't need to know that stuff.
   The only people, I can imagine who need to know it, would be those
   developing third party add ons to do a better job than what comes native
   from IBM.  If you work for such an entitiy, then they already have
   appropriate education for their people.

   Some of the info you ask for, cannot be given to the general public for
   security reasons.  In other words, one of the reasons that OS/400 never
   shows up on lists of hacked systems, or systems with some kind of security
   problem, is because people without a proven need to know internals, cannot
   get at such info.

   If we are one of your last hopes, then you have not been looking in the
   right places, since there are hundreds if not thousands of places, with
   answers to your questions.  Are you familiar with a concept known as
   Search Engines, such as Google?

     Hello, I'm looking for technical data on the OS/400.
      
     I would like to know how does it compare to mainstream OS, if it is a
     batch processing system or interactive, and a little bit about his
     heritage.
      
     Some of the information that I need deals with the Name and type of
     Kernel, Process Scheduling, Scheduling Algorithms and Policies
     (Pre-emptive, Non Pre-emptive), Critical Sections, Mutex and Semaphores,
     Managing Tasks and how they are applied into OS/400. It is a real
     challenge to find information on these topics. I only know that QJOBSCD
     is the Job Scheduler.
      
     I have already e-mailed IBM and received an uncomplete answer. I know it
     is very difficult (almost impossible) to have some of this information.
     However, it would be very appreciated if you can at least answer one of
     these questions, or refer me to someone who knows about it. You are one
     of my last hopes.
      
     Thanks very much to anyone that answers,
      
     N. Wong
      
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   -
   Al Macintyre
   http://en.wikipedia.org/wiki/User:AlMac
   http://www.ryze.com/go/Al9Mac
   BPCS/400 Computer Janitor ... see
   http://radio.weblogs.com/0107846/stories/2002/11/08/bpcsDocSources.html