The CA MICS STK VSM VTD Mount Time Distribution report is
created from the VTV Mount Activity (SVTVMR) file. The
values on the X axis are the VTV mount times specified in
VTSOPS by the CA MICS administrator on the VTVMOUNTTIME
parameter. Most virtual mounts should occur very quickly,
which will be obvious from the tallest bars on the left. The
bars in the middle or right of the chart should appear to be
very low. If they do not, that may indicate excessive
recalls from real tape or tape drive contention. This may
require more detailed analysis to focus in on the offending
mounts.
The chart body displays the following measurements from the
VTV Mount file (SVTVMR):
o Number of virtual tape mounts that were satisfied between
0 and less than half a second
o Number of virtual tape mounts that were satisfied between
.5 seconds and less than 1 second
o Number of virtual tape mounts that were satisfied between
1 second and less than 2 seconds
o Number of virtual tape mounts that were satisfied between
2 seconds and less than 5 seconds
o Number of virtual tape mounts that were satisfied between
5 seconds and less than 30 seconds
o Number of virtual tape mounts that were satisfied between
30 seconds and less than 60 seconds .
o Number of virtual tape mounts that were satisfied between
1 minute and less than 2 minutes
o Number of virtual tape mounts that were satisfied in a
time greater than 2 minutes
The metrics from the database used to create this chart
were as follows:
o SVTVVALx - VTV Mount Time Distribution Limits
o SVTVDSTx - VTV 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 TAPPSF, 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 virtual
tape mounts based on the time values defined in the
VTVMOUNTTIME 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 3-17. StorageTek VSM VTD Mount Time Distribution
|
Copyright © 2014 CA.
All rights reserved.
|
|