Author Topic: Some VERY IMPORTANT questions about OS/2  (Read 5349 times)

vorg619

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Some VERY IMPORTANT questions about OS/2
« on: 2007.06.28, 14:22:53 »
Please help me. Please answer my few questions. Here are these:

Is the OS/2 an Inter processing?
Is the OS/2 have a Time - Sharing system?
Is the OS/2 have a Virtual Storage?
Is the OS/2 a Real - time processing?
IS the OS/2 a Virtual Machine processing?
Is the OS/2 a multi - user processing?

Kindly please answer these. Thanks a lot guys!...
« Last Edit: 2007.06.28, 16:27:04 by vorg619 »

mobybrick

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Re: Some VERY IMPORTANT questions about OS/2
« Reply #1 on: 2007.06.28, 22:29:44 »
Is the OS/2 an Inter processing?
- No idea what you mean
Is the OS/2 have a Time - Sharing system?
- If you mean 'Does OS/2 use time divison multitasking' then the answer is yes.
Is the OS/2 have a Virtual Storage?
- If you mean can OS/2 use virtual memory ('storage') then the answer is yes.
Is the OS/2 a Real - time processing?
- If you mean does OS/2 allow applications to time events or data in real-time, then the answer is no. OS/2 is not a real-time operating system. However, it does offer a high resolution timer, which allows near real-time events and processing. With the availability of the timer, and with the use of server priority processes (or with the use of critical sections) then OS/2 can be effectively used for near real-time processing.
IS the OS/2 a Virtual Machine processing?
- Yes, all processes by default under OS/2 run under their own virtual machine, although there is a shared memory arena.
Is the OS/2 a multi - user processing?
- By default, no. However, this is not the end of the answer: There are at least three ways of some kind of level of multi-user processing available:
  a) HPFS386 offers local security, and forces OS/2 to track the permission of not only local files against the logged on user, but also forces OS/2 to track process permissions. HPFS386 is now not widely available, as it was an add-on to server versions of OS/2.
  b) A variant of OS/2 was built with full multi-user capability, and was the product that we now know as Citrix (which started on OS/2 but later became a Windows server).
  c) The standard OS/2, or eComStation, available today, is not multi-user out-of-the-box, but IBM provided the SES API (Security Enablement Services) which provide hooks into the kernel for process and file access control. A facsimilie of a multi-user system is therefore available through the use of add-ons.

Hope this helps,
Moby.

vorg619

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Re: Some VERY IMPORTANT questions about OS/2
« Reply #2 on: 2007.06.29, 14:30:39 »
Thanks for replying my friend!...
But by the way, would you please explain the Time-sharing, Virtual machine processing, and virtual storage?..

I really need it because of our homework. Thanks again!... :D

ModZilla

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Re: Some VERY IMPORTANT questions about OS/2???
« Reply #3 on: 2011.03.12, 19:40:58 »
this was already answered :: in fact he did quite a nice interpretation of your persistant vagueness in this regard, not only do I too often forget about just doing an internet - wide search on topics, I rely on discussions here that are relevhant to my interests not so much in eCommStation but specifically in regards to OS2 optimization, WSeB, TCP/IP stacks, networking and the famous eServer by IBM using Apache. If you would think virtual machines are in order here ie with OS2 releases, well perhaps it would be better to try AltaVista using more concise inquiry using keywords like Ubunto VirtualMachine, VMware or??? I searched the work place shell and got 8,950,000 hits there and low and behold some were very succintly relevant, woah noah can you see the flood coming? A virtual sunami of porn on this site now-pooh! I think its time me start my own OS2 blog, been thinking about this for sometime now, guess its just time to move on...so I won't have to worry about ... :P :P :P

G'Day
someday os2 will be ruled by the young and famous-at least in the open-source world!

Fahrvenugen

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Re: Some VERY IMPORTANT questions about OS/2
« Reply #4 on: 2011.03.12, 20:05:12 »
Thanks for replying my friend!...
But by the way, would you please explain the Time-sharing, Virtual machine processing, and virtual storage?..

I really need it because of our homework. Thanks again!... :D

Forgive me for being direct, but if you're doing this for homework, shouldn't you do some of your own research on the subjects of What Is virtual machines processing, time sharing, virtual storage, etc? 

It is one thing to ask questions if OS/2 supports certain technologies within an OS/2 forum.  It is another thing to ask people on that forum to do your homework for you.  Where I'm from, having other people doing your homework for you is called plagiarism and generally will result in an F in any school/college/university I've gone to.

Some of these concepts you've asked about have been around for a long time within the computer industry.  I'm sure you could visit a library, any decent text covering introduction to operating system concepts should cover these types of things.  Failing that, you can always google.

Just my $0.02.


RobertM

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Re: Some VERY IMPORTANT questions about OS/2
« Reply #5 on: 2011.03.12, 22:51:02 »
"Is the OS/2 have a Time - Sharing system?"

The answer to this may also be "no, well kind of"

If by time sharing, you are referring to how old mainframe systems allocated processor usage to client machines, then "kinda" - OS/2 does not have that type of a mechanism in the normal old-fashioned mainframe sort of way, but does something akin to "time-sharing" by multitasking the requests. I'm at a loss on a simple way to explain the differences as it does not seem you are sure of what the concept is that you discuss.

Your best bet is to research both how mainframes did timesharing and how OS/2 does file, print, app and device sharing to network connected clients (and it does all of the above). There are vast differences - all while there are also many similarities.

Regardless, I second Fahrvenugen's post. Here's something I learned over the years... I truly didnt learn and understand something unless I dug up the answers, read up on it, fooled around with it, and kept digging until I knew I had an understanding of things. Someone providing you with the answers won't help you learn things like this. You need to achieve a true understanding of those answers that cannot be gained by "us doing your homework".
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