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  1.  Home
  2. RPG400-L
  3. September 2008

Re: Question about opening and closing files

James Lampert wrote:
How much overhead would you say is involved in making files *USROPN, and
keeping them open only while actually performing I/O on them, as opposed
to doing things the usual way?

We're thinking of doing this in a trigger program, in order to cut back
on the number of file locks.

If you're looking to do multiple OPEN / CLOSE cycles, the normal
mitigation (shared ODP) won't be useful for your goal of reducing locks.
You'll need to weigh the expense of multiple OPEN / CLOSE cycles
against the lock situation.

For what it's worth, I haven't personally seen a user OPEN as more
expensive than letting the cycle do it.

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