On 1/03/2023 9:01 am, Andrew Rowley wrote:
The Achilles heel for Java on z/OS seems to be dataset I/O. It's adequate, but feels like it should be faster. (I haven't actually done direct comparisons with other languages.)
Following up an old post of my own here, because I did actually compare the JZOS RecordReader to other languages (C and Assembler).
It turns out I was wrong, and the Java I/O using RecordReader seems to be close to the speed of Assembler and C. Certainly not slow as I thought. So Java is fast all round.
Incidentally, zEDC compressed datasets give a big boost in I/O speed for reading SMF data in my testing, e.g. 2-5x faster. This was tested on the on the Dallas RDP system under VM - I don't know whether VM affects I/O performance.
-- Andrew Rowley Black Hill Software ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
