There's an old trick of saving the PF to a SAVF and the reading that to
get the "deleted" data. Or, some utility programs like DBU have the
ability to reactivate deleted records.
The space can be reused if you change the PF to REUSEDLT(*YES). Of
course, you then won't be able to read the prior contents of that RRN.
John.Mckown@xxxxxxxxxxxxxxxxx 01/02/2009 11:44:38 AM >>>
Just to be sure that I understand about the "single level store". When
an object is created, it gets an address. The MI uses this address
(which I think of as a virtual storage address) to access the object.
When that object is destroyed, the address is never reused. From my
reading, the address still points to the destroyed object. The storage
for the contents of the object is released, but the "header" now has
something that says "this object is invalid". If the object was a
permanent object, that specific address is never reused unless the
entire system is dumped and restored. If the object was a temporary
object, the address might be reused after an IPL. True? This is what I
gathered from reading Dr. Soltis' books.
Also, in a PF, when a record is deleted, the space for that record is
not used for a new record. New records are always added at the end of a
physical file. Space can only be reclaimed when the PF is re-organized.
Now for my question. Is there any way to read that deleted record? I ask
because there was an old access method on MVS called ISAM. It did not
delete records either. It simply marked the record as deleted with an
indicator in the record. But a person could use a special option which
would allow a program to read the deleted record. So I was curious if it
is possible to read a "deleted" record.
Hope everybody is having a good year, so far.
John McKown
Systems Engineer IV
IT
Administrative Services Group
HealthMarkets(r)
Administrative Services Group
9151 Boulevard 26 * N. Richland Hills * TX 76010
(817) 255-3225 phone * (817)-961-6183 cell
john.mckown@xxxxxxxxxxxxxxxxx * www.HealthMarkets.com
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