ACBSHR

1 ACBSHR=
2.1! N
2.1 Y

ACBSHR

Specifies whether this IMS™ subsystem shares a common set of application control blocks (ACBs) with other IMS subsystems in an IMSplex.

N

This IMS™ subsystem uses its own dedicated set of ACBs.

Y

The set of ACBs that this IMS subsystem uses is shared by other IMS subsystems.

When IMS™ management of ACBs is enabled (ACBMGMT=CATALOG), the set of ACBs are in the IMS directory data sets of the IMS catalog. Set ACBSHR to Y when multiple IMS subsystems use the same IMS catalog.

When the ACBs are managed by your installation (ACBMGMT=ACBLIB), the set of ACBs are in ACBLIB data sets. Set ACBSHR to Y when multiple IMS subsystems use the same ACBLIB data sets.

When ACBSHR=Y is specified, you must use the IMSPLEX parameter to specify the IMSplex that this IMS subsystem is in. See IMSPLEX for information on how you do this.

When ACBSHR=Y is specified, FM/IMS serializes the use of dynamic PSBs across the IMSplex. Otherwise, FM/IMS serializes the use of dynamic PSBs across the IMS subsystem.

This parameter is optional. If it is not specified on the FMN1POPI macro statement, FM/IMS uses either the value specified on the FMN1POPD macro statement (if specified on that statement), or N (otherwise).

The user cannot override the value you specify for this parameter.