IBM Mainframe Forum

[ahmad]

i have a question about LPAR.

LPARS work sequentially or parallel?
we know that LPAR is unique device(cp,memory,output devices) physically; but its logically two or more systems with their own OS.
So i'll be glad if someone answer me.

[dick scherrer]

Hello Ahmad and welcome to the forum,

LPARS work sequentially or parallel?

They work independently of each other. If there are 2 lpars, both have work going on concurrently.

As with any shared resource, if multiple processes want to use it at the exact same time, they take turns so one encounters a brief wait.

I'm not sure what you really want to know and i'm not sure i've answered. . .

[ahmad]

thanks a lot dear friend.
you know, i'm not even sure that my question is true and acceptable or not. but as you say and I say so, lpars work sequentially, cus, if two or more processes request cpu at same time, it'll service to one process and then to another one. (maybe)just like round robin algorithm in pc.
anyway i'm new in mainframe & i need more & more informations.

[dick scherrer]

You're welcome

but as you say and I say so, lpars work sequentially

Not quite what i said (or meant to say).

My observation was:

As with any shared resource, if multiple processes want to use it at the exact same time, they take turns so one encounters a brief wait.

What i would encourage is to let this be something that you look into more deeply after you become more knowledgable. I believe it is premature now. If you are completely new to the environment, there are many other disciplines you will benefit by learning before being concerned with lpar management/contention.