What is reorganization of a VSAM file

reachcyrus · New User Joined: 13 Jul 2007 Posts: 24 Location: chennai

Hi,

what is reorganization of a VSAM file?
cheers!!

murmohk1 · Posted: Fri Jul 27, 2007 1:08 pm

Cyrus,

Refer the previous post -

ibmmainframes.com/about3916.html

expat · Posted: Fri Jul 27, 2007 2:47 pm

In addition to the thread linked to by murmohk1

With speed, cahing and read ahead algorithms of modern DASD subsystems, there will be little if any performance benefit from doing a reorg of a KSDS. Maybe if it reduces the number of index levels being used by the KSDS, byt that is quite a rare occurance too.

So, if your KSDS is nearing its 123 extent limit, that's the time to think about a reorg.