Example 3: Evaluating a randomizer

The following figure shows a JCL example for evaluating a randomizer.

In this example:

RECON data sets are allocated dynamically by using the DFSMDA members in the IMSDALIB DD data set.
The input ADS is dynamically allocated. The allocation information (DD name and DS name of the ADS) is obtained from DBRC.
The RMODLIB and the RMOD keywords specify the new randomizer, TSTRAND1 in USER.RMODLIB. FPA simulates placement of the segments with the new randomizer.
The threshold values of SYN_LEN_AVG and SYN_MAX are evaluated twice: for the current areas and for the simulated areas. The results are written in the Area Tuning Summary report.
The FILECTL subcommand specifies DSNAME='HPFP.TAR.&AREA', which causes a tuning aid record data set allocated dynamically for each area with the name of HPFP.TAR.areaname.
Two sets of analysis reports are generated in the data set pointed to by the HFPRPTS DD statement: one for the current areas and another for the simulated areas.

Figure 1. Evaluating a randomizer

//HFP      EXEC PGM=HFPMAIN0
//STEPLIB  DD DISP=SHR,DSN=HPFP.SHFPLMD0
//         DD DISP=SHR,DSN=IMSVS.SDFSRESL
//         DD DISP=SHR,DSN=IMSVS.PGMLIB
//IMSACB   DD DISP=SHR,DSN=IMSVS.ACBLIB
//IMSDALIB DD DISP=SHR,DSN=IMSVS.MDALIB
//HFPRPTS  DD SYSOUT=*
//HFPPRINT DD SYSOUT=*
//HFPSYSIN DD *
 GLOBAL
   DBRC=YES
 TUNE
   DBD=DEDBJN22,
   IAREA=ALL
 SIMULATE
   OAREA=ALL,
   RMODLIB='USER.RMODLIB',
   RMOD=TSTRAND1,
   REPORTDD=HFPRPTS
 THRESHOLD
   SYN_LEN_AVG=2,
   SYN_MAX=8
 FILECTL
   DSNAME='HPFP.TAR.&AREA',
   STORCLAS=STORCLAS,
   DISP=(NEW,CATLG),
   SPACE=(CYL,100,100)
 REPORT
   REPORTDD=HFPRPTS
/*