The CA MICS STK VSM RTD Mount Time Distribution report is
created from the Real Tape Mount Activity (SVTRMR) file. The
values on the X axis are the real tape mount times specified
in VTSOPS by the CA MICS administrator on the RTDMOUNTTIME
parameter. Real tape mounts take longer by nature than
virtual tape mounts. The tape needs to be retrieved from a
slot in the library by the robot arm. Then the tape is
inserted into a drive and spun down to the point on the tape
where the virtual volume is located, so it can be copied back
to the disk buffer. Still, the chart will show the
distribution in mount times. Depending on the values set in
the RTDMOUNTTIME parameter, the bars will probably be in the
middle of the chart. If any bars appear to be excessive on
the right side of the chart, they may have taken a long time
to satisfy. Additional reporting may be needed to determine
the cause of the excessive mount times.
The chart body displays the following measurements from
the RTD Mount file (SVTRMR):
o Number of real tape mounts that were satisfied between
0 and less than 5 seconds
o Number of real tape mounts that were satisfied between
5 seconds and less than 10 seconds
o Number of real tape mounts that were satisfied between
10 seconds and less than 30 seconds
o Number of real tape mounts that were satisfied between
30 seconds and less than 60 seconds
o Number of real tape mounts that were satisfied between
1 minute and less than 2 minutes
o Number of real tape mounts that were satisfied between
2 minutes and less than 3 minutes
o Number of real tape mounts that were satisfied between
3 minutes and less than 4 minutes
o Number of real tape mounts that were satisfied in a
time greater than 4 minutes
The metrics from the database used to create this chart were
as follows:
o SVTRVALx - RTD Mount Time Distribution Limits
o SVTRDSTx - RTD Mount Time Distribution Counts
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 TAPPSG, whose Catalog Group is PERFORM
o Complete the MICF Execution panel
o Complete the specification panel. Refer to section
3.2.2.1, StorageTek VSM MICF Inquiry Specification
Panels, for information about modifiable panel fields.
The following report sample shows the distribution of real
tape mounts by system by day based on the time values defined
in the RTDMOUNTTIME parameter set in prefix.parms(VTSOPS).
DAYS STK VSM VTD Mount Time Distribution ---------------------------------------------- System Identifier=SYS1 VTSS ID=VTSS4 ---------------------------------------------- VTV Mounts Sum 330 + ***** | ***** | ***** 300 + ***** | ***** | ***** 270 + ***** | ***** | ***** 240 + ***** | ***** | ***** 210 + ***** | ***** | ***** 180 + ***** | ***** | ***** 150 + ***** | ***** | ***** 120 + ***** | ***** | ***** 90 + ***** | ***** | ***** 60 + ***** | ***** | ***** | ***** 30 + ***** ***** | ***** ***** | ***** ***** ***** ***** ***** | ***** ***** ***** ***** ***** ***** -------------------------------------------------------------------------------------------------------- 0.5 1.0 2.0 5.0 30.0 60.0 120.0 3600.0 Mount Time Distribution in Seconds TAPPSF 18AUGyy BASED ON Data Presented by Day
Figure 3-18. StorageTek VSM VSM RTD Mount Time Distribution
|
Copyright © 2014 CA.
All rights reserved.
|
|