System Use Reporting › System Use Report Samples › Disk and Tape Activity Graphs › Considerations

Considerations

• TAPE DRIVE OCCUPANCY shows tape drive occupancy broken down by batch and TSO.
• The Tape Occupancy denominator is seconds in each interval times number of tapes in CONFIGs. FLD1 is tape occupancy time as measured by job or step elapsed time divided by tape occupancy denominator.
• The MP factor is the elapsed time in the interval divided by the seconds in each interval.
• The DISK AND TAPE EXCP RATES show EXCP rates broken down by disk and tape. I/O denominator is seconds in each interval times maximum EXCPs per second. FLD2 is disk EXCPs divided by I/O denominator. FLD3 is tape EXCPs divided by I/O denominator. Total length of bar is FLD2 + FLD3.
• Graph characters for tape drive occupancy are as follows:
  • ID 1 is batch elapsed time for jobs or steps using tape
  • ID 2 is TSO elapsed time for jobs or steps using tape. This shows up only if TSO option is on.
• Refer to the Considerations section under CPU Activity Graphs for information regarding core shifts and multiple day reporting.

 CA JARS                               DISK AND TAPE ACTIVITY                                              PAGE    1
 Resource Accounting SP0                                                                                          12 FEB 1998  09
 
 TIME OF MEASUREMENT IS FROM 98/01/02 AT 20.37.36                                                 TOTAL
                                                                                                  TOTAL
                        TO   98/01/04 AT 07.14.07                                                 INCLUDES  98/01/02 THRU 98/01/04
                                TAPE DRIVE OCCUPANCY - FLD1                   DISK AND TAPE EXCP RATES - FLD2, FLD3
  FLD1  FLD2  FLD3       0        25        50        75       100    MP    0        25        50        75       100
  ( PERCENTAGES )        +---------+---------+---------+---------+  FACTOR  +---------+---------+---------+---------+  DAYS
  11.7  17.9   1.2   0000 BBTTT                                       3.3    *******-                                     2
  12.5  20.3   0.6   0030 BBBTT                                       3.8    ********                                     2
  12.5  21.1   0.6   0100 BBBTT                                       3.8    ********-                                    2
       .                                                                 .
       .                                                                 .
       .                                                                 .
  14.8  26.5  15.0   1000 BBBTTT                                     46.8    ***********------                            1
  15.1  26.9  17.8   1030 BBBBTT                                     51.7    ***********-------                           1
  18.6  65.8   8.1   1100 BBBBBTT                                    53.1    **************************----               1
  18.6  33.0  20.5   1130 BBBBTTT                                    46.3    *************--------                        1
  14.1  48.2   8.3   1200 BBBBTT                                     46.4    *******************----                      1
  11.1  11.7  24.1   1230 BTTT                                       13.0    *****---------                               1
  12.4  12.4  25.4   1300 BTTTT                                      12.7    *****----------                              1
  21.0  40.6  14.5   1330 BTTTTTTT                                   41.5    ****************------                       1
  14.7  45.4   9.4   1400 BBBBTT                                     52.1    ******************----                       1
  17.2  22.9   3.5   1430 BBTTTTT                                    45.8    *********--                                  1
   8.9  19.3   3.0   1500 BBTT                                       45.9    ********-                                    1
  10.2  32.1   3.3   1530 BBBT                                       45.6    *************-                               1
  14.8  48.8  14.7   1600 BBBBTT                                     41.8    ********************-----                    1
  12.6  47.3  11.0   1630 BBBTT                                      34.3    *******************----                      1
   8.3  79.8   0.4   1700 BBT                                        14.3    ********************************             1
   2.6  84.0  15.4   1730 B                                          12.2    **********************************------     1
   0.1  32.8   1.9   1800                                             4.3    *************-                               1
   0.0   0.8   0.0   1830                                             0.1                                                 1
   3.6  37.8   4.0   1900 B                                           4.6    ***************--                            1
  11.5  61.3   8.6   1930 BBBTT                                       7.9    *************************---                 1
   9.3  34.5  26.5   2000 BBBB                                        5.2    **************----------                     1
   4.5  10.2  12.6   2030 BT                                          2.1    ****-----                                    2
   6.3  14.3   3.4   2100 TTT                                         2.5    ******-                                      2
   4.8  14.3   3.4   2130 TT                                          2.4    ******-                                      2
   0.0  14.3   3.4   2200                                             2.0    ******-                                      2
   3.9  13.2   3.1   2230 TT                                          2.4    *****--                                      2
   9.9  10.5   1.7   2300 BTTT                                        3.3    ****-                                        2
  11.1  15.6   5.0   2330 BBTT                                        3.5    ******--                                     2
 SUMMARY - ALL                                                                                                            3
   4.7  10.7   2.4 DEFIND BT                                          6.0    ****-
   9.8  22.2   4.9 MEASRD BBTT                                       12.5    *********--
 
                         +---------+---------+---------+---------+          +---------+---------+---------+---------+
                         0        25        50        75       100          0        25        50        75       100
 
 L E G E N D
 
 FIELD   DESCRIPTION                SYMBOL           SCALE
 
 FLD1    TAPE DRIVE OCCUPANCY       BT               100 PCT =    8 DRIVES OCCUPIED
 FLD2    DISK EXCP RATE             *                100 PCT =  154 EXCP / SEC (MAX OBSERVED)
 FLD3    TAPE EXCP RATE             -