Greg,

        Reclamation is done on a storage pool basis, unlike migration which
can control the number of processes is starts.  Since it is being done on a
pool basis and is trying to reclaim empty space, reclamation will be more
efficient if it uses only a single output volume and multiple input volumes.
It will also eliminate volume contention for files which span volumes used
as reclamation input.  Migration is also node based whereas reclamation is
not necessarily node based (unless the pool is a collocated pool).

        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>