SAMPLIB member CBRIALCY, as shown here, provides data set allocation for part of the OAM object tables and directories. You must modify and run the job successfully before you use OAM.

//CBRIALCY JOB  MSGLEVEL=(1,1),MSGCLASS=A
//***********************************************************
//*
//*  $SEG(CBRIALCY) COMP(OSR) PROD(OAM):
//*
//*  OAM DB2 Data Set Allocation Job (for Administration
//*  Databases).
//*
//*  Run CBRIALCY to define the VSAM ESDSs that
//*  will be used by DB2 for the OAMADMIN databases
//*  required by OAM.
//*
//*  Prior to executing this job you need to make the
//*  following modifications:
//*
//*  1. Change "vol_ser" to the volume serials that your
//*     target database should reside on.
//*  2. Change "pri_alloc" and "sec_alloc" to the desired
//*     number of cylinders for each particular VSAM ESDS
//*     being defined. For example, CYLINDER(pri_alloc
//*     sec_alloc) may be CYLINDER(200 10).
//*  3. Change "cat_name" to the name of the catalog you
//*     will be using under DB2.
//*  4. If you intend on using the DSN1COPY utility to copy
//*     these data bases, then you must include the REUSE keyword
//*     in the DEFINE CLUSTER command for each data base.
//*
//*  Following data set allocations, run CBRISQLY (provided
//*  in SAMPLIB for your modification) to define the
//*  OAM Administration databases using the data sets
//*  allocated by this job.
//*
//*  CHANGE ACTIVITY:
//*    $00=OY28892 320 890601 TUCJRL: Add unique indexes to
//*                                   those defined in
//*                                   CBRIALCX
//*    $L1=OAMR1B  R1B 080807 TUCBLC: Prolog (Bug Sug #82)
//*
//***********************************************************
//STEP0X  EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//SYSUDUMP DD SYSOUT=*
//SYSIN    DD *
 DELETE                                               -
 cat_name.DSNDBC.OAMADMIN.CBRMGTY.I0001.A001          -
     CLUSTER                                          -
     PURGE
 DELETE                                               -
 cat_name.DSNDBC.OAMADMIN.CBRSTOY.I0001.A001          -
     CLUSTER                                          -
     PURGE
 DEFINE CLUSTER                                       -
 (NAME(cat_name.DSNDBC.OAMADMIN.CBRMGTY.I0001.A001)   -
         LINEAR                                       -
         SHAREOPTIONS(3 3)                            -
         VOLUMES(vol_ser)                             -
         CYLINDERS(pri_alloc sec_alloc)               -
         UNIQUE   )                                   -
       DATA                                           -
 (NAME(cat_name.DSNDBD.OAMADMIN.CBRMGTY.I0001.A001))
 DEFINE CLUSTER                                       -
 (NAME(cat_name.DSNDBC.OAMADMIN.CBRSTOY.I0001.A001)   -
         LINEAR                                       -
         SHAREOPTIONS(3 3)                            -
         VOLUMES(vol_ser)                             -
         CYLINDERS(pri_alloc sec_alloc)               -
         UNIQUE   )                                   -
       DATA                                           -
 (NAME(cat_name.DSNDBD.OAMADMIN.CBRSTOY.I0001.A001))