Results of a successful DEFRAG operation

Figure 1 is the printout from a DEFRAG run for a DASD volume. It gives an indication of the free space fragmentation before and after a DEFRAG operation, as well as the distribution of data set extents by size.

The following JCL was used for this job:

//STEPT010  EXEC PGM=ADRDSSU,PARM='RACFLOG=YES,TRACE=YES'
//SYSPRINT DD SYSOUT=*
//SYSIN    DD *
  DEFRAG DYNAM(D9S060)
/*

Figure 1. Printed Output Resulting from a Successful DEFRAG Run on nonEAV:

PAGE 0001     5695-DF175  DFSMSDSS V2R10.0 DATA SET SERVICES     1999.211 14:55
  DEFRAG           -
     DYNAM(D9S060)
ADR101I (R/I)-RI01 (01), TASKID 001 HAS BEEN ASSIGNED TO COMMAND 'DEFRAG '
ADR109I (R/I)-RI01 (01), 1999.211 14:55:33 INITIAL SCAN OF USER CONTROL
                         STATEMENTS COMPLETED.
ADR016I (001)-PRIME(01), RACF LOGGING OPTION IN EFFECT FOR THIS TASK
ADR006I (001)-STEND(01), 1999.211 14:55:33 EXECUTION BEGINS
ADR208I (001)-EANAL(01), 1999.211 14:55:34 BEGINNING STATISTICS ON D9S060:
                          FREE CYLINDERS                     000058
                          FREE TRACKS                        000003
                          FREE EXTENTS                       000002
                          LARGEST FREE EXTENT (CYL,TRK) 000053,0003
                          FRAGMENTATION INDEX                 0.050
                          PERCENT FREE SPACE                     97
ADR220I (001)-EANAL(01), INTERVAL BEGINS AT CC:HH 00001:0000 AND ENDS AT
                         CC:HH 00006:000C
ADR209I (001)-EFRAG(01), 1999.211 14:55:34 MOVED EXTENT 001 FROM
                         00006:0000-00006:0004 TO 00001:0000-00001:0004
                         FOR PUBSEXMP.ESDS.S01.DATA
ADR209I (001)-EFRAG(01), 1999.211 14:55:34 MOVED EXTENT 001 FROM
                         00006:0005-00006:0006 TO 00001:0005-00001:0006
                         FOR PUBSEXMP.KSDS.S01.DATA
ADR209I (001)-EFRAG(01), 1999.211 14:55:35 MOVED EXTENT 001 FROM
                         00006:0007-00006:0008 TO 00001:0007-00001:0008
                         FOR PUBSEXMP.SAM.S01
ADR209I (001)-EFRAG(01), 1999.211 14:55:35 MOVED EXTENT 001 FROM
                         00006:0009-00006:000A TO 00001:0009-00001:000A
                         FOR PUBSEXMP.PDS.S01
ADR209I (001)-EFRAG(01), 1999.211 14:55:35 MOVED EXTENT 002 FROM
                         00006:000B-00006:000B TO 00001:000B-00001:000B
                         FOR PUBSEXMP.PDS.S01
ADR213I (001)-EANAL(01), 1999.211 14:55:35 ENDING STATISTICS ON D9S060:
                          DATA SET EXTENTS RELOCATED         000005
                          TRACKS RELOCATED                   000012
                          FREE CYLINDERS                     000058
                          FREE TRACKS                        000003
                          FREE EXTENTS                       000001
                          LARGEST FREE EXTENT (CYL,TRK) 000058,0003
                          FRAGMENTATION INDEX                 0.000

PAGE 0002     5695-DF175  DFSMSDSS V2R10.0 DATA SET SERVICES   1999.211 14:55
ADR212I (001)-EANAL(01), EXTENT DISTRIBUTION MAP FOR D9S060:
                   EXTENT *FREE SPACE BEFORE* *FREE SPACE AFTER* *ALLOCATED *
                    SIZE
                      IN     NO.   CUM.     NO.   CUM.      NO.   CUM.
                   TRACKS   EXTS  PCT/100  EXTS  PCT/100   EXTS  PCT/100
                       1                                     4   0.148
                       2                                     4   0.444
                       5                                     1   0.629
                      10                                     1   1.000
                      75      1   0.085
                    >499      1   1.000      1   1.000
ADR006I (001)-STEND(02), 1999.211 14:55:35 EXECUTION ENDS
ADR013I (001)-CLTSK(01), 1999.211 14:55:35 TASK COMPLETED WITH RETURN CODE 0000
ADR012I (SCH)-DSSU (01), 1999.211 14:55:35 DFSMSDSS PROCESSING COMPLETE. HIGHEST
                   RETURN CODE IS 0000

Note: The following section of the printed output resulting from a successful DEFRAG run changes for EAV to include two columns: first column refers to the entire volume, the second column refers to the cylinder-managed space, as follows:

Figure 2. A Section of the Printed Output Resulting from a Successful DEFRAG Run on EAV:

ADR213I (001)-DFANL(01), 2007.226 12:50:17 ENDING STATISTICS ON C9NS05:
                          *STATISTICS*                  *VOLUME*    *TRKAREA*
                          DATA SET EXTENTS RELOCATED    00000037    00000033
                          TRACKS RELOCATED              00003212    00001007
                          FREE CYLINDERS                00086950    00065236
                          FREE TRACKS                   00000022    00000022
                          FREE EXTENTS                  00000005    00000004
                          LARGEST FREE EXTENT (CYL,TRK) 00063426.03 00063426.03
                          FRAGMENTATION INDEX           0.050       0.010

The value in the first column of message ADR212I is the size of the extent in tracks (free space or data set) and is printed only if an extent of that size occurs. The second and third columns show the number of free space extents existing before processing that were of the size shown in the first column, along with their cumulative percentage divided by 100. The fourth and fifth columns give the same information for free space, but after processing. The sixth and seventh columns give the distribution of allocated data set extents, which do not change during a run.