PATH establishes a relation between the base cluster and the alternate index. Its not a data set and does not occupy any space. It does not contain any records. It is justa a entry in the catalog, which establishes a link between the base cluster and the alternate index cluster.
//PATHDEF JOB (ACCT),’DEFINE PATH’
//DEFPATH EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSIN DD *
DEFINE PATH –
(NAME (STUDENT.KSDS.PATH) –
PATHENTRY (STUDENT.KSDS.AIX1.CLUSTER) –
PATHENTRY ~ specifies the alternate index cluster to which the path is related.
UPDATE ~ This parameter indicates that bothe tha base cluster and its alternate index assosciated with it is opened for processing, when the path is opened for processing.
NOUPDATE ~ Only the base cluster is opened for processing. UPDATE is default option.