On Thu, 18 Sep 2008 09:04:52 -0400, Hylton Tom P wrote:

>As DB2 guy, I used to religously use the CSVLLAxx member to avoid
>impacting others.
>
>However, my main zos guru recommended to me a while back (maybe the last
>2 ZOS releases?) that the benefits were so minimal now that it wasn't
>worth the effort to code  the CSVLLA route any longer, and to just go
>ahead and do a total refresh each time.

I always considered the performance impact to be minimal, and being lazy by
nature, my tendency has been to just do a full refresh.  It's hard to
imagine how the performance impact would have been reduced, though.  It
still has to read all those directories.

At my last shop, a full refresh has been known to cause problems for the IMS
folks.  I never understood why, and they claim that it was not because they
had prestaged updates to LLA managed data sets.  Knowing what I do about the
change management process there, I tend to believe  them.  I do know that
there were times that they came looking for me because I had performed a
full refresh and they had to cycle some IMS regions.

I don't know what else they might have been managing with LLA.  Remember
that it's not just for linklist.

-- 
Tom Marchant

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