What is the difference between specifying DISP=OLD and DISP=SHR for a dataset?

What is the difference between specifying DISP=OLD and
DISP=SHR for a dataset?

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What is the difference between specifying DISP=OLD and DISP=SHR for a dataset?..

DISP=OLD means os will search for an existing data set of
the name specified
DISP=SHR allows multiple jobs to read the same data set.

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What is the difference between specifying DISP=OLD and DISP=SHR for a dataset?..

Answer / guest

DISP=OLD denotes exclusive control of the dataset; DISP=SHR
means there is no exclusivity.

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