Re: Reclaim storage question -- MIDRANGE-L

These days most of the anomalies that RCLSTG uncovers on our systems would be 
invisible otherwise. They mostly involve objects left in QTEMP after jobs fail 
in some spectacular fashion. (Also those re-orgs IBM's database files.) As the 
system and O/S have advanced over the years I've seen fewer and fewer damaged 
objects, especially since IBM started including batteries to keep main-store 
from being wiped out so that MI instructions could be completed. That's not to 
say that such things can't happen anymore, but these days RCLSTG mostly 
recovers storage on disk that would otherwise have been lost forever.

In our shop we're more suspicious of RCLSTG fouling things up then we are of 
GO-SAVE-Option-21 completely failing on a damaged object. We don't have 
operators or a weekend staff so we developed an application that first does a 
GO-SAVE-Option-21 and then optionally does a RCLSTG (and an IPL when there are 
PTFs to be applied). We've done a RCLSTG on all of our systems every weekend 
for 3 1/2 years and we've never had a problem. Only recently we had to stop 
doing it on one system because the IFS portion of the save was taking 3 hours 
to complete, but once we resolve this problem we'll start doing RCLSTG again.
  ----- Original Message ----- 
  From: Dave Snyder 
  To: Midrange Systems Technical Discussion 
  Sent: Tuesday, August 15, 2006 9:01 AM
  Subject: Reclaim storage question


  Since the reclaim storage question has come up again, I am wondering if
  I need to do another soon. The last one I ran was on a previous box
  (820) and that was on Feb 1, 2004. I have not done one on this new box
  (520). That was on v5r1 and we are now on v5r3. We have had no abnormal
  shutdowns since on this 520. 

  We went to this 520 last October so I am not overly concerned about
  running one, but thought I would ask.

  Any guidelines or hints as to how often to run one if things are going
  smooth, as they normally do? Is there are value to watch for a certain
  threshold to trigger one?

  Dave 

   


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