-----------------------------<snip>-----------------------------------
Which was why in the day I remember sorting input batch files in reverse
(descending) key sequence so that the ISAM I/O would find the "next"
insertion point without traversing the entire overflow chain. Ideally,
if the "next" point was at the start of an overflow chain, *none* of the
chain had to be read to do the next insertion.
Ah yes, those were the days... (not!).
-----------------------------<unsnip>-------------------------------
ISTR doing the same thing, sorting into descending order the names of
members to be deleted from a large PDS. In that case, the overhead of
rewriting the directory after the deletion point made my decision MUCH
easier. Still works well with large PDS's today. I learned it initially
when cleaning up an old SYS1.UADS dataset. :-)
Rick
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