At month end a job of ours that nornally runs a few minutes took several 
hours by lpar saturation.  Our job reads a JCL PDS used by the DBAs.  They 
complained because their job and subsequent jobs were held up by hours. 
And once their job ran it took an hour instead of a minute (no 
exaggeration!).

We have been asked to change our job which would require changing it on at 
least 6 plexes.

Our solution is for them to change their job.

They are using a construct that has the followed DD

//OUTPUT DD DISP=OLD, DSN=IMS.DBA.JCLLIB(MEMBER)

The question I have is:  Is the DISP=OLD needed or does the QSAM interface 
to BPAM handle collisions?

I vaguely remember that the MIM product had a feature added to it to 
handle member collisions in the middle to late 1980's by Ed Legowski so 
collisions were an issue back then.  (EDIF maybe????)

So what is current state of the art?  We are 1.10 with 1.11 rolling out 
this year (it's on 5-10 lpars already).

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