In this example, an SMS-managed key-sequenced cluster is defined. The DEFINE CLUSTER command builds a catalog entry and allocates space to define the key-sequenced cluster SMS04.KSDS01.

//DEFINE   JOB  ...
//STEP1    EXEC PGM=IDCAMS
//SYSPRINT DD   SYSOUT=A
//SYSIN    DD   *
    DEFINE CLUSTER -
           (NAME (SMS04.KSDS01) -
           STORAGECLASS (FINCE02) -
           MANAGEMENTCLASS (MC1985) -
           DATACLASS (VSAMDB05))
/*

The parameters for this command follow:

• STORAGECLASS specifies an installation-defined name of a storage class, FINCE02, to be assigned to this cluster.
• MANAGEMENTCLASS specifies an installation-defined name of a management class, MC1985, to be assigned to this cluster. Attributes of MANAGEMENTCLASS control the data set's retention, backup, migration, etc.
• DATACLASS specifies an installation-defined name of a data class, VSAMDB05, to be assigned to this cluster. Record size, key length and offset, space allocation, etc., are derived from the data class and need not be specified.