On Thu, 8 May 2008 18:05:31 -0400, Rob Scott wrote:

>Tom
>
>A very common usage of that field is store some info about the level of the 
z/OS system packs (eg "put level"). A site can add a simple jobstep to their 
sysres cloning/propagation JCL to update the field using a simple zap.
 
 
Hi Rob,

Some sites certainly do that but certainly not all sites, nor is the format 
common by any reasonable definition.  Some folks stick the date (in various 
formats) into the field, some plant the PUT or ESO level into the field, some 
use both.  I've seen many combinations.  I have seen sites use the field to 
identify different systems in a shop and (in much larger entities) to identify 
different shops throughout the corporation.  I don't know whether outsourcers 
make use of the field in a manner similar to Todd's idea.  
 
Smaller sites tend not to be aware or be too burdened with other work to 
bother updating the field at all.  
 
To Wayne's point, there is no common, standard place in any IBM-standard 
data structure that holds such a Universal Customer-ID value.  (I agree with 
Wayne.)  The CPUID ought to be unique (at least until PSI is able to sell their 
hardware).  
 
I don't see any compelling reason why customers would want to have to 
maintain such a value.  (Customers don't see other customers' dumps so they 
don't have the need.)  
 
Perhaps some ISVs use the license key values to accomplish Todd's goal?  
 
-- 
Tom Schmidt 
 

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