On Friday, 01/13/2006 at 01:34 EST, Steve Gentry 
<[EMAIL PROTECTED]> wrote:
> We have also discussed the idea of using Virtual Disk and mapping a 
minidisk to 
> extended storage. XC and all that entails. 

A few more words about data spaces:
- mapping them to mdisks is optional.  It's useful only as a way to prime 
or save the space's content.
- they have no CMS content in them so you get the whole space and are 
insulated from the vaguaries of CMS memory layouts.
- you can control how much memory is consumed by data spaces on a per-user 
basis via XCONFIG in the directory
- a user can have more than one data space.  It might be useful to 
allocate data spaces in, say, 128MB increments.  This way only the users 
who have the largest tables consume the most memory.

Alan Altmark
z/VM Development
IBM Endicott

Reply via email to