Terminating affinities that persist

A terminal cannot participate in session balancing if it has a persisting affinity with a particular IMS from a previous session. When VTAM® manages the VGR affinity, affinity is automatically reset at session termination.

When IMS manages the VGR affinity, an affinity persists after a logoff or IMS failure in each of the following situations:

• The terminal is static with LOCAL status recovery mode, and has end-user significant status (Conversation, STSN, Fast Path, or full-function response mode).
• The terminal is ETO SLUP or 3600 Finance terminal with LOCAL status recovery mode and RCVYSTSN=YES.
• The terminal is an ISC parallel-session terminal with LOCAL status recovery mode that has not quiesced.
• The terminal is an ISC parallel-session terminal, and one or more of the parallel sessions has not quiesced.
• The MSC link is in an ERE status.

You can terminate an affinity using any of the following methods:

• Enter the /CHECKPOINT command with the LEAVEGR keyword.
• Use the Logoff or Signoff exit routine to reset terminal status.
• Cold start the IMS TM subsystem, and specify the GRSNAME when restarting IMS.

Related reading:

• For information on the /CHECKPOINT command and the LEAVEGR keyword, see IMS Version 15.5 Commands, Volume 2: IMS Commands N-V.
• For information on the Logoff and Signoff exit routines, see IMS Version 15.5 Exit Routines.