Terminating an ISC TCP/IP session in an orderly manner
During an orderly termination, both IMS and the partner subsystem complete normal processing before the session is terminated. No work is left pending and the connection is terminated in a cold state.
When the connection is restarted, IMS and the partner subsystem do not need to resynchronize the connection.
To terminate an ISC TCP/IP session without disrupting work
that is already in progress, issue the /QUIESCE IMS type-1 command.
The IMS /CHECKPOINT command
with the FREEZE, PURGE, or DUMPQ parameter
and the QUIESCE parameter will also initiate an
orderly termination. The QUIESCE parameter ensures
that message queues are emptied before the session is terminated.
When all terminals indicate that shutdown is complete, IMS completes checkpoint processing.