On 02/04/2016 10:09 PM, David Crayford wrote:
IBM switched the magic bit to offload the JZOS JNI C/C++ workload to a
zIIP so they could do the same for DFSORT. A well engineered library
could handle the callbacks so the client just reads records like a
normal API. That would certainly push Java batch up a notch.
One question that puzzles me (maybe it's my lack of an application
programming background): Why is sort used so much on z/OS?
I know you can then e.g. do grouping based on key changes, but is that
really necessary in current programs? Is that the reason it is commonly
used?
I generally use e.g. Java HashMap, C# Hashtable for grouping so the data
doesn't need to be sorted. Do other common languages on z/OS provide
similar functions? (C++ I know.) Are there opportunities to use
programming language features to avoid sorts altogether?
Andrew Rowley
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