The CA MICS IBM VTS Virtual Tape Drive Analysis Report
displays statistics for the virtual tape drives assigned to
the VTS. The report provides mount durations, counts of
mounts by type (scratch vs. specific), and concurrent mount
information. A graphic shows the maximum concurrent mounts
as a percent of those available. At a glance the graphic
shows if peak z/OS workload activity is approaching the limit
of available virtual tape drives.
Of particular interest are the concurrent mount statistics
(minimum, average, and maximum). Time periods where the
number of drives concurrently mounted are consistently at or
near the available count indicate periods where z/OS
workloads may experience delays waiting for a tape mount.
The report uses both the distributed and composite VTS
headers, based on the VTS type reported. These headers and
their content are described in section 3.2.1.1.2.
The report body reports on the following measurements from
left to right:
Interval count and average number of configured virtual
drives:
o Number of Recording Intervals - INTERVLS
o Avg Virtual Drives Concur Mounted - fffAVVCM
Durations of virtual tape mounts; total, minimum, average,
and maximum:
o Total Virtual Mount Duration
computed in report code: fffTVM * fffAVVMD
o Min Virtual Mount Duration - fffMMVMD
o Avg Virtual Mount Duration - fffAVVMD
o Max Virtual Mount Duration - fffMXVMD
Virtual tape mount counts; total and by category, followed
by the percent of mounts that were specific (non-scratch):
o Virtual mounts by category
- Total Virtual Mounts - fffTVM
- Virtual Fast-Ready Mounts - fffVFRM
- Total Virtual Specific Mounts - fffVSPM
- Percent of mounts that were specific
computed in report code: fffVSPM/fffTVM*100
Minimum, average, and maximum number of concurrently
mounted virtual drives:
o Min Virtual Drives Concur Mounted - fffMNVCM
o Min Virtual Drives Concur Mounted - fffAVVCM
o Min Virtual Drives Concur Mounted - fffMXVCM
Finally, a graph shows the maximum concurrently mounted
drives as a percentage of the configured (available) virtual
drives.
At the bottom of the report, a line is generated that shows
summary totals, minimums, maximums, averages, or percentages,
as appropriate for the detailed data in each column.
Report data for VTS type COMPOSITE is generated from the
VTS Composite Library Activity (IVTVCL) file. Report data
for VTS types UI, SECONDARY, and STANDALONE is generated from
the VTS Distributed Library Activity (IVTVDL) file.
To produce the report:
o Enter the CA MICS Workstation Facility (MWF)
o Choose option 2, CA MICS Information Center Facility
(MICF)
o Choose option 2, Database Inquiries
o Select TAPLVD, IBM VTS Virtual Tape Drive Analysis, whose
Catalog Group is PERFORM
o Complete the MICF Execution panel
o Complete the specification panel. Refer to section
3.2.1.1.1, IBM VTS MICF Inquiry Specification Panels, for
information about modifiable panel fields.
IBM VTS Virtual Tape Drive Analysis (TAPLVD) Report Sample
----------------------------------------------------------
The following report sample shows the virtual tape drive
activity for a day by hour. The VTS reported is a
peer-to-peer configuration. The three report pages show the
Composite VTS statistics followed by statistics for the User
Interface (UI) and Secondary VTSs.
The graphical representation of the percentage of available
virtual drives concurrently mounted clearly shows that the
early hours (00:00 AM through 3:00 AM) and the late hours
(16:00 PM through 22:00 PM) are the times when z/OS workloads
are most heavily requesting virtual tapes.
Inquiry : TAPLVD IBM VTS Virtual Tape Drive Analysis Report Run Date: 02OCTyy Data Presented by Hour within Day Page 001 VTS Library ID: K9200 VTC Preferred I/O : NONE Copy Mode Setting: Mixed Report Start: 29SEPyy:00:00 Library Type : PtP-COMPOSITE VTC Preferred Mast: VTS0 VTC Maint Level : 7414.00 Report End : 29SEPyy:24:00 UI/SEC IDs : K9229/K9230 F/C 4001 Status : Enabled Timespan : DAYS ---------------------------------------------------------------------------------------------------------------------------------- Day: 29SEPyy ---Virtual Mount Durations--- --Total Virtual Mounts--- -----Maximum Concurrent Mounts------ Vir Concurrent Percent of Configured Numb Drv Total Min Avg Max Pct Mounts 1 HOUR Intv Cfg HH:MM:SS MM:SS MM:SS HH:MM:SS Total Scrtch Spcfic Spfc Min Avg Max 2 4 6 8 0 ---- ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- 0------0------0------0------0------0 0 1 128 49:17:02 0:03 5:22 1:11:22 551 239 312 57% 20 48 86 ************************ 1 1 128 53:28:13 0:04 4:17 1:19:29 749 345 404 54% 24 54 90 ************************* 2 1 128 72:34:12 0:03 2:57 1:31:16 1476 592 884 60% 24 76 123 *********************************** 3 1 128 41:02:10 0:04 6:35 1:40:22 374 168 206 55% 19 46 82 *********************** 4 1 128 34:45:00 0:01 5:00 2:09:07 417 153 264 63% 13 34 58 **************** 5 1 128 20:22:00 0:02 2:10 2:05:39 564 206 358 63% 11 26 58 **************** 6 1 128 35:00:40 0:01 3:04 2:50:11 685 119 566 83% 7 18 37 ********** 7 1 128 31:57:00 0:01 2:42 2:43:36 710 149 561 79% 11 23 47 ************* 8 1 128 18:12:20 0:01 1:53 1:01:34 580 148 432 74% 6 20 42 ************ 9 1 128 15:23:39 0:01 3:23 1:29:18 273 55 218 80% 7 18 40 *********** 10 1 128 11:26:12 0:02 4:42 1:03:20 146 65 81 55% 7 15 28 ******** 11 1 128 5:18:36 0:03 11:48 0:31:09 27 5 22 81% 1 4 9 *** 12 1 128 1:40:30 0:11 2:14 0:23:11 45 23 22 49% 0 5 14 **** 13 1 128 2:10:50 0:05 2:37 0:16:41 50 26 24 48% 1 6 15 **** 14 1 128 5:49:27 0:01 1:27 0:08:36 241 16 225 93% 3 8 16 ***** 15 1 128 9:03:16 0:01 0:58 0:12:56 562 267 295 52% 8 20 47 ************* 16 1 128 32:02:48 0:01 2:32 0:59:30 759 507 252 33% 9 58 126 *********************************** 17 1 128 65:09:48 0:04 5:39 1:06:55 692 472 220 32% 17 58 110 ******************************* 18 1 128 28:50:42 0:01 2:42 1:03:56 641 359 282 44% 8 28 66 ******************* 19 1 128 47:58:12 0:02 2:42 1:21:50 1066 503 563 53% 11 52 112 ******************************** 20 1 128 42:50:24 0:03 2:48 1:25:42 918 395 523 57% 16 52 100 **************************** 21 1 128 68:36:14 0:03 4:59 2:13:58 826 370 456 55% 15 59 111 ******************************* 22 1 128 30:55:40 0:01 3:10 1:12:38 586 215 371 63% 10 37 72 ******************** 23 1 128 32:05:14 0:03 3:43 1:41:24 518 181 337 65% 9 29 59 ***************** ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- Tots 24 128 756:00:09 0:01 3:22 2:50:11 13456 5578 7878 59% 0 33 126 ----------------------------------------------------------------------------------------------------------------------------------
Inquiry : TAPLVD IBM VTS Virtual Tape Drive Analysis Report Run Date: 02OCTyy Data Presented by Hour within Day Page 001 VTS Library ID: K9229 Library Make-Model: 3584-L22 Lib Maint Level: 534.13 Report Start: 29SEPyy:00:00 Library Type : PtP-UI VTS Cache Size : 1728 GB VTS Maint Level: 749.05 Report End : 29SEPyy:24:00 Composite ID : K9200 F/C 4001 Status : Enabled Timespan : DAYS ---------------------------------------------------------------------------------------------------------------------------------- Day: 29SEPyy ---Virtual Mount Durations--- --Total Virtual Mounts--- -----Maximum Concurrent Mounts------ Vir Concurrent Percent of Configured Numb Drv Total Min Avg Max Pct Mounts 1 HOUR Intv Cfg HH:MM:SS MM:SS MM:SS HH:MM:SS Total Scrtch Spcfic Spfc Min Avg Max 2 4 6 8 0 ---- ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- 0------0------0------0------0------0 0 1 128 46:59:22 0:02 5:01 1:23:57 562 394 168 30% 33 48 61 ***************** 1 1 128 53:48:52 0:04 4:19 1:17:26 748 535 213 28% 38 53 77 ********************** 2 1 128 72:18:24 0:03 2:56 1:29:22 1479 961 518 35% 40 74 97 *************************** 3 1 128 39:02:41 0:01 6:07 1:37:31 383 267 116 30% 31 45 71 ******************** 4 1 128 34:46:48 0:01 4:56 2:09:05 423 297 126 30% 23 31 40 *********** 5 1 128 20:03:18 0:01 2:06 2:04:42 573 384 189 33% 16 25 46 ************* 6 1 128 30:48:49 0:03 2:41 2:50:01 689 384 305 44% 12 20 35 ********** 7 1 128 31:46:40 0:02 2:40 3:31:54 715 408 307 43% 11 22 36 ********** 8 1 128 17:24:00 0:04 1:48 1:01:33 580 359 221 38% 12 18 32 ********* 9 1 128 15:27:02 0:03 3:23 1:27:58 274 179 95 35% 11 15 22 ****** 10 1 128 10:50:05 0:03 4:29 1:02:06 145 100 45 31% 6 13 20 ****** 11 1 128 4:59:15 0:03 11:05 1:28:21 27 15 12 44% 4 6 14 **** 12 1 128 6:37:30 0:05 8:50 2:34:19 45 30 15 33% 4 4 7 ** 13 1 128 3:35:50 0:04 4:19 1:33:45 50 29 21 42% 4 5 10 *** 14 1 128 10:05:00 0:03 2:30 3:53:34 242 115 127 52% 4 6 11 *** 15 1 128 15:30:00 0:03 1:40 3:26:27 558 371 187 34% 4 12 32 ********* 16 1 128 29:37:54 0:01 2:18 0:59:07 773 618 155 20% 6 43 116 ********************************* 17 1 128 59:27:40 0:01 5:08 1:18:08 695 585 110 16% 25 50 99 **************************** 18 1 128 37:27:25 0:03 3:01 1:42:38 745 589 156 21% 19 35 66 ******************* 19 1 128 47:02:56 0:03 2:38 1:21:18 1072 831 241 22% 26 48 109 ******************************* 20 1 128 42:54:00 0:01 2:45 1:25:22 936 658 278 30% 28 48 76 ********************* 21 1 128 67:56:48 0:01 4:54 2:13:30 832 590 242 29% 23 58 89 ************************* 22 1 128 31:10:36 0:01 3:08 1:11:56 597 374 223 37% 21 34 66 ******************* 23 1 128 33:43:13 0:03 3:53 1:41:17 521 332 189 36% 17 29 43 ************ ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- Tots 24 128 763:24:08 0:01 3:21 3:53:34 13664 9405 4259 31% 4 31 116 ----------------------------------------------------------------------------------------------------------------------------------
Inquiry : TAPLVD IBM VTS Virtual Tape Drive Analysis Report Run Date: 02OCTyy Data Presented by Hour within Day Page 001 VTS Library ID: K9230 Library Make-Model: 3584-L22 Lib Maint Level: 534.13 Report Start: 29SEPyy:00:00 Library Type : PtP-SECONDARY VTS Cache Size : 1728 GB VTS Maint Level: 749.05 Report End : 29SEPyy:24:00 Composite ID : K9200 F/C 4001 Status : Enabled Timespan : DAYS ---------------------------------------------------------------------------------------------------------------------------------- Day: 29SEPyy ---Virtual Mount Durations--- --Total Virtual Mounts--- -----Maximum Concurrent Mounts------ Vir Concurrent Percent of Configured Numb Drv Total Min Avg Max Pct Mounts 1 HOUR Intv Cfg HH:MM:SS MM:SS MM:SS HH:MM:SS Total Scrtch Spcfic Spfc Min Avg Max 2 4 6 8 0 ---- ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- 0------0------0------0------0------0 0 1 128 30:16:40 0:03 3:20 0:59:18 545 399 146 27% 24 44 59 ***************** 1 1 128 57:36:39 0:02 4:17 1:23:57 807 600 207 26% 32 50 77 ********************** 2 1 128 70:24:24 0:02 2:59 1:29:22 1416 1074 342 24% 38 69 93 ************************** 3 1 128 49:29:10 0:02 5:50 1:37:30 509 387 122 24% 30 51 74 ********************* 4 1 128 27:38:04 0:02 4:26 2:09:03 374 247 127 34% 25 32 38 *********** 5 1 128 25:35:50 0:03 3:14 2:04:40 475 342 133 28% 16 24 45 ************* 6 1 128 31:54:44 0:02 2:34 2:50:00 746 458 288 39% 13 22 35 ********** 7 1 128 27:01:10 0:02 2:22 3:31:52 685 436 249 36% 10 18 30 ******** 8 1 128 15:48:18 0:02 1:27 0:58:50 654 414 240 37% 9 18 33 ********* 9 1 128 13:43:20 0:02 3:20 1:27:57 247 150 97 39% 9 13 19 ***** 10 1 128 12:57:36 0:02 3:12 1:08:46 243 154 89 37% 6 13 19 ***** 11 1 128 5:23:57 0:03 10:27 1:28:20 31 20 11 35% 4 8 14 **** 12 1 128 6:44:48 0:04 8:48 2:34:18 46 39 7 15% 4 5 7 ** 13 1 128 1:45:55 0:04 2:35 0:16:39 41 38 3 7% 4 5 10 *** 14 1 128 9:51:05 0:02 2:53 3:53:33 205 120 85 41% 4 5 10 *** 15 1 128 10:32:56 0:03 1:41 3:26:25 376 299 77 20% 4 7 27 ******** 16 1 128 20:43:06 0:02 1:33 0:59:06 802 670 132 16% 5 28 115 ******************************** 17 1 128 62:54:49 0:03 4:53 1:17:57 773 674 99 13% 25 60 111 ******************************* 18 1 128 33:22:40 0:03 2:40 1:42:37 751 596 155 21% 16 30 65 ****************** 19 1 128 42:53:13 0:03 3:01 1:21:17 853 641 212 25% 24 44 108 ****************************** 20 1 128 45:35:37 0:01 2:31 1:25:19 1087 722 365 34% 28 45 76 ********************* 21 1 128 60:13:10 0:03 4:26 1:43:05 815 613 202 25% 22 58 86 ************************ 22 1 128 35:23:20 0:01 3:16 2:13:25 650 476 174 27% 24 37 67 ******************* 23 1 128 34:19:45 0:02 3:51 1:41:15 535 384 151 28% 16 27 43 ************ ---- --- --------- ----- ----- -------- ------ ------ ------ ---- --- --- --- Tots 24 128 732:10:16 0:01 3:13 3:53:33 13666 9953 3713 27% 4 30 115 ----------------------------------------------------------------------------------------------------------------------------------
Figure 3-8. IBM VTS Virtual Tape Drive Analysis
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