Defining the level of persistent support

VTAM® Persistent Session Tracking is provided for both single-node persistent sessions (SNPS), and multinode persistent sessions (MNPS). You must indicate which level of persistent support is needed for RNR.

MNPS allows VTAM sessions to be reconnected to another CPC in a sysplex, if necessary. SNPS requires that VTAM sessions be reconnected to the same CPC they were connected to when the outage occurred.

The level of VTAM persistent session support desired for IMS is specified on the APPL definition statement using the PERSIST=MULTI|SINGLE parameter. The default setting is PERSIST=SINGLE. If no PERSIST specification is entered, PERSIST=SINGLE is assumed.