Eric,

        I am not by any means sure of my understanding either but here goes.

Reclamation is an internal, "hidden", process which is triggered
automatically on an hourly cycle.  Apparently, it is internally limited to
only a single driving process (the hidden part) that controls multiple
execution processes, which are what you see with the process query.  It
examines the volumes table entries for candidates which qualify under the
reclaim threshold.  Those qualifying volumes, regardless of storage pool,
are processed for reclamation.  When you adjust the threshold (at 10:00) to
lower the value to your recovery point on the storage pool(s), it also
triggers the "hidden" process.  The reclamation then proceeds until it
either processes all the qualifying entries or the threshold is reset.  When
you reset the threshold at 16:00, you effectively stop reclamation until the
next reset at 10:00 the next day (or cycle).  The process then repeats
itself.  The threshold reset acts as a "cancel process" command to the
hidden reclamation driving process.

        Does this make sense?

        Gary L. Ison
        Governor's Office for Technology
        101 Cold Harbor Drive
        Frankfort, Ky.   40601
        Phone:  (502) 564-8724
            Fax:  (502) 564-6856
E-mail: Gary.Ison AT mail.state.ky DOT us <mailto:Gary.Ison AT mail.state.ky 
DOT us>