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