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Looking at run time efficiencies on zOS 16 on 3931 mainframe with JAVA. We found on jobs running assembler level programs that specifying a large number of buffers when reading huge files reduces run times. Does the JVM exploit the zOS DFSMS subsystem directly?

We know that specifying BUFNO=50 for large files read by other languages improves run time by reducing the number of physical I/O operations. We are designing testing for JAVA batch jobs with these changes in JCL BUFNO values, but we do not know how well the JVM interacts with the zOS host.

本文标签： JAVA JVM for IBM ZOSdoes it use DFSMS IO efficiencies such as large BUFNOStack Overflow

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