Secondary index
You must define one Secondary index for each data store and initialize it with a header record.
This is an example of JCL for the scratch and creation of the secondary index file:
//DELSKI EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* DELETE OPCDEV.SKI0X CLUSTER PURGE //*---------------------------------------------------------------- //DEFSKI EXEC PGM=IDCAMS //SYSPRINT DD SYSOUT=* //SYSIN DD * DEFINE CLUSTER(NAME(OPCDEV.SKI0X)- CYLINDERS(2,1)- VOLUMES(S25PRA)- KEYS(40,0)- RECORDSIZE(76,32000)- CISZ(4096)- UNIQUE- INDEXED- SHR(1,3)- FREESPACE(10,10))