[Default] On Mon, 16 Oct 2017 09:45:34 -0700 (PDT), in
bit.listserv.ibm-main Dan Kalmar <[email protected]> wrote:
>In our case the plan is to convert CPU intensive Cobol programs to Java in
>attempt to offload work onto the ZIIPs.
>We don't have ZIIP eligible workloads that we can measure before hand.
>We have ZIIPs available to run the new Java workloads.
>We know that those CPU intensive COBOL programs account for at least 30% of
>the GCP charges.
>Not sure how to estimate the overhead in CPU of calling JAVA programs from
>COBOL programs in batch and CICS.
If the programs haven't been tuned by someone who understands COBOL
and how it works, I suspect that I could reduce their consumption by a
fair amount. Also I believe that some services such as XML that can be
accessed by COBOL programs run on the ZIIP/ZAP. If the COBOL programs
use the SORT verb, some of that work may be off-loaded to the
ZII{/ZAP. Read your DF SORT or SYNSORT manual. Arithmetic may give
different results in Java. Get someone who really knows both
languages and the facilities currently available in COBOL to reduce
CPU consumption and off-load work to ZIIP/ZAP to review your situation
before embarking on a conversion to JAVA.
Clark Morris
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