RE: Freeing Deleted Disk Space

[Buck Calabro <Buck.Calabro@xxxxxxxxxxxx>]

Scotty Muir wrote:

>We have a file (*File PF-Data) on the AS/400
>that one of our programmer has deleted a
>lot of records from, but we have not gotten
>back any of the freed disk space.

There have been several mentions of RGZPFM and the fact that nobody else can
be using the file whilst you reorg it, but nobody has mentioned the KEYFILE
parameter.  It might be a can of worms for an AS/400 newcomer and no harm
will come if you disregard the following...

RGZPFM allows you to physically re-sort the records according to the
sequence of the file specified in the KEYFILE parameter.  If you have an
item master file (PF) which is keyed in item number order AND you do most of
your read/chains by item number you may see a performance boost if you
specified KEYFILE(*FILE).  If most of your read/chains are by vendor, and
logical file PRODLF1 is the logical ordered by vendor ID, then
KEYFILE(PRODLF1) will sort the PF in vendor ID order.

No harm will come from omitting this, but you could conceivably hurt
performance if you pick a key sequence that is rarely used.  I thought I'd
bring this up to give you something more to think about.
  --buck