Binding single or parallel sessions

To bind a single session, either negotiable or Nonnegotiable BIND is sent. The ISC logical unit with which IMS is communicating must have been defined with a static set of LTERMs during IMS system definition. IMS ignores the session qualifier pair (SQP) field on both CINIT and BIND.

To bind a parallel session, the CINIT and BIND parameters must include a SQP field to identify the specific parallel half-session instance between IMS and a logical unit. (All sessions created dynamically using the ETO feature are parallel sessions.) This field in the bind parameters contains both the primary and the secondary session qualifiers. The half-session name of the ISC node communicating with IMS consists of the logical unit name concatenated with its associated session qualifier. The IMS half-session name is the IMS ACB name concatenated with the session qualifier associated with IMS. The IMS session qualifier is the subpool name. Both half-session names are saved across session and IMS subsystem failures and are used to allocate, or validity-check when warm starting, the LTERM subpool to be used for the session.