For those MUMPS veterans. you can also use the $ZSEARCH function. As in the example:

  NEW $NAMESPACE
  SET $NAMESPACE="USER"
  SET file=$ZSEARCH("i*")
   WHILE file'="" {
       WRITE !,file
       SET file=$ZSEARCH("")
   }
   WRITE !,"That is all the matching files"
   QUIT

I think this one will be faster

The second option that Marc Mundt stated is the simplest and most readable IMHO. The $PIECE pseudo variable could be a little expensive in performance:

set lst="" for i=1:1:someNumber set $PIECE(lst,",",i)=myval

You can run a script that back-up all your CACHE.DAT files from alpha to your dev server.