STK VSM VTD Usage Summary (TAPLSD)
The
MICS
STK VSM VTD Usage Summary report is created from measurements in the VTV Mount Request (SVTVMR) and VTV Dismount Request (SVTVDR) files.micsrm140
The report displays the usage patterns of the virtual tape drives by hour. Important information in this report is the maximum number of concurrent tape drives in use at any point in the hour.
The report body displays the following measurements derived by combining the VTV Mount file (SVTVMR) and the VTV Dismount file (SVTVDR).
- Minimum virtual tape drives allocated concurrently
- Average virtual tape drives allocated concurrently
- Maximum virtual tape drives allocated concurrently
- Number of unique virtual tape drive addresses used
- Number of virtual tape volumes mounted during the reporting period
- Average duration a virtual tape drive was allocated to a job
- Maximum duration in time a virtual tape drive was allocated
- Graphic of maximum concurrent VTD usage
Usage Considerations:
Number of tape drives is a fixed resource. The number of virtual drives available to a system can be quite high. Still, this resource must be monitored and tracked. Typically several host systems will share the resources of a VTSS. If a VTSS has the capacity for 1024 virtual tape drives, and four systems are sharing the resource, each host might be allocated 256 virtual tape drives. This might seem like a lot, but during peak production tape usage, they might all be consumed. By monitoring and tracking the virtual tape drive usage patterns, the storage administrator might be able to alert production control staffs of potential periods of resource shortages in advance, allowing time for possible schedule shifts.
To produce the report:
- Enter theMICS Workstation Facility(MWF)
- Choose option 2,MICS Information Center Facility(MICF)
- Choose option 2, Database Inquiries
- Select TAPLSD, whose Catalog Group is PERFORM
- Complete the MICF Execution panel
- Complete the specification panel. For information about modifiable panel fields, see StorageTek VSM MICF Inquiry Specification Panels.
The following report sample shows the usage of the virtual tape drive by hour by day for each host system using the VTSS resource.
StorageTek VSM VTD Usage Summary Report Sample
INQUIRY: TAPLSDMICSSTK VSM VTD Usage Summary RUN DATE: 18AUGyy Data Presented by Hour within Day Page 001 VTSS Library ID:VTSS1 Report Start: 28MAYyy:00:02 Report End : 29MAYyy:01:25 Timespan : DETAIL ---------------------------------------------------------------------------------------------------------------------------------- Day: 28MAYyy -----Concurrent VTD Usage------------------------------ --VTD Occupancy Times--------------------------------------------+ Minimum Average Maximum | Unique VTD Total | | | VTDs VTDs VTDs | Addresses VTVs | | Concurrent VTD Usage | HOUR Allocated Allocated Allocated | Used Mounted | Average Maximum TotaL | | ---- --------- --------- --------- ---------- ------- -------- -------- -------- |0---10---20---30---40---50---60---| 0 1 13 29 97 164 0:02:45 0:00:02 9:02:41 *************** 1 15 23 33 101 250 0:03:53 0:00:29 18:31:11 ***************** 2 23 29 42 126 325 0:04:16 0:04:00 22:46:53 ********************* 3 14 20 37 96 201 0:06:04 0:00:00 15:57:44 ******************* 4 10 19 30 141 362 0:03:22 0:00:10 11:59:34 *************** 5 13 20 38 113 324 0:03:14 0:00:04 14:50:12 ******************* 6 20 27 38 135 426 0:02:55 0:02:07 19:27:40 ******************* 7 16 23 28 120 378 0:03:04 0:01:15 16:45:52 ************** 8 15 23 30 98 387 0:03:30 0:02:15 17:10:00 *************** 9 9 17 27 108 257 0:03:21 0:02:54 12:27:46 ************** 10 11 18 23 96 227 0:03:24 0:00:31 13:37:44 ************ 11 9 14 20 73 165 0:05:26 0:06:50 10:19:57 ********** 12 5 11 20 72 168 0:03:15 0:01:15 7:48:10 ********** 13 6 12 23 89 190 0:02:42 0:00:00 8:36:05 ************ 14 8 13 17 87 168 0:03:32 0:02:16 9:06:22 ********* 15 8 15 25 83 142 0:03:58 0:10:01 11:21:06 ************* 16 8 17 28 119 235 0:03:29 0:03:52 11:25:22 ************** 17 4 11 21 85 184 0:02:26 0:00:00 7:20:43 *********** 18 3 8 24 73 136 0:02:14 0:00:01 4:40:31 ************ 19 5 9 23 77 108 0:04:20 0:00:13 5:58:47 ************ 20 9 14 26 114 222 0:04:26 0:04:09 9:31:29 ************* 21 7 14 27 95 235 0:03:11 0:06:49 9:15:19 ************** 22 2 8 24 103 176 0:01:27 0:00:52 3:32:38 ************ 23 11 18 32 155 383 0:01:36 0:00:02 8:54:09 **************** ----------------------------------------------------------------------------------------------------------------------------------