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Status Not under consideration
Workspace CICS Transaction Gateway
Categories Runtime
Created by Guest
Created on Mar 16, 2024

RELATED IDEAS

Threadsafe IPICSERVER Connection Configuration Option THREADSAFE=YES


IPICSERVER section THREADSAFE=YES configuration parameter, to DPL as Threadsafe for IPIC Connections into CICS.

CICS PPT DFHMIRS is Threadsafe.

This would initially start the task on an Open L8 TCB in CICS, rather than starting on QR, further reducing QR contention.

No waiting for DB2/MQ or CONCURRENCY(REQUIRED) PPT program link.

This would be similar to CICS DPL over IPIC to another CICS Region; the task initially starts on L8 Open TCB.

Example:

SECTION IPICSERVER=WOR1

Description=IPIC Server with Threadsafe Option

Threadsafe=YES

Hostname=MYLPAR.COM

Port=3906

TcpKeepAlive=YES

SrvIdleTimeout=00

srvretryinterval=0

ConnectTimeout=20

SendSessions=20

ENDSECTION


Idea priority Medium
  • Admin
    ANUBHUTI KAUSHIK
    Reply
    |     Apr 16, 2024

    Hi,


    Thanks for submitting the idea, we appreciate your input. However CICS TG does not have control over invoking transactions in a thread safe way. As a gateway, we pass the program request and data to CICS. After that its upto CICS to decide how does it want to run the program.

    We checked with CICS TS team on to clarify on this idea. Their response is quite clear as well.

    For IPIC connections the mirror task is always threadsafe. There isn't any setting in an IPCONN or sent in from a connected system that can affect that. The mirror program will proactively switch to an L8 TCB for most request that do not involve user code (e.g. a remote file read). The mirror does not switch to an L8 for a DPL, though it will remain on an L8 if the target program returns on an L8. This means that there isn't much that can be done in CICS to change the amount of time spent on the QR TCB by the mirror task. Task initialisation will be done on QR and all processing up to linking to the target user program will also be on QR. If the DPL request specified SYNCONRETURN then the mirror would terminate after returning the application response so there would be no observed benefit of remaining on an L8 after the target program completed.

    In case, this does not help you, or you have a different use case, please open an idea with CICS TS product.

    Thanks

    Anu

    Product Manager

    CICS TG


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