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Curiosity question.
Each night in the wee hours we create a test environment from a
production library, thus:
SAVLIB PROD01 to QTEMP/SAVF
CLRLIB TST01
RSTLIB QTEMPSAVF to TST01
It runs in about 41-45 minutes.
Last night I had to do a (occasional) copy of T01 to T02. I did this:
CLRLIB T02
CPYLIB T01 to T02
It took 45 minutes. I figured creating T02 this way would be quite a
bit faster than creating T01, but it wasn’t.
T01 was created about 3-3:45 am. T02 was created 4:30-5:15 am. There
is really nothing else running at these times.
Any thoughts on why the CPYLIB approach is not faster? CPYLIB did seem
to do a lot of index rebuilding (observed in a test during the day.)
Maybe SAVLIB/RSTLIB is smarter about indexes and/or does more in parallel.
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