Bill Godfrey wrote:
On Mon, 25 Mar 2013 09:46:56 -0400, Thomas David Rivers wrote:
I'm reworking some code to avoid multiple OPENs for
reading PDS members..
But, I will still be just reading one member at a time,
and I don't know the member names a-priori.
The DFSMS documentation states that using BLDL + FIND
(and using the ttr,C form for FIND) results in a performance
improvement... over simply pointing FIND at the DCB.
I am curious to know where the documentation says that. Can you be more
specific?
Hi Bill,
I'm looking at z/OS V1R12.0 DFSMS Using Data Sets (SC26-7410-10)
under the heading "BLDL - Construct a Directory Entry List". Paragraph
4 says:
You can improve retrieval time by directing a subsequent FIND
macro to the BLDL list rather than to the directory to locate
the member to be processed.
I can readily believe that statement if the BLDL list has more than
one entry... hence my question...
- Dave Rivers -
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