Re: Intial Program Load (IPL)

[PaulMmn <PaulMmn@xxxxxxxxxxxxx>]

In general, an IPL 'refreshes' the system:

--library QRPLOBJ is cleared-- when a program is re-compiled, the old 
program is moved to QRPLOBJ just in case someone is using the program 
at that time.  Clearing the library releases that disk space back to 
general use.
--all system programs start 'fresh'-- in those rare instances where a 
program has a 'memory leak,' all the 'leaked' memory is cleared and 
once again available for use.
--Journals are rolled to use new Journal Receivers
--depending on your selected IPL options, hardware is checked for problems
--Hardware is reset
--The system is checked for the state it was in when it last ended-- 
normal or abnormal.  If abnormal, the system checks everything for 
consistancy.  It can also take a main storage dump of what was 
running when the system crashed (a -very- rare occurance!).  File 
indices that were open when the system ended are re-built.

There's lots more; the link in one of the other messages points to a 
complete list of what goes on!

--Paul E Musselman
PaulMmn@xxxxxxxxxxxxxxxxxxxx


At 10:54 PM +0800 10/13/12, John Mathew wrote:
> Hi,
>
> what is the purpose of IPL(Intial Program Load). What are steps 
> involved in IPL.
>
> thanks in advance.
>
> John