The CA MICS Hydra Virtual Tape Mount Analysis Report
displays statistics for the virtual tape mounts satisfied by
the virtual tape server. The report provides the total cache
size and cache usage in addition to the total number of
virtual tape mounts with three sets of statistics for each
mount type: scratch (fast-ready), cache hit, and cache miss
(recall). The final two report columns show the percent of
specific virtual mount requests that were cache misses, both
as a number and a graphic. At a glance, this graphic shows
periods where excessive cache misses occur. Cache misses
result in degraded virtual tape performance.
The report uses the report header described in section
3.2.3.1.2.
The report body reports on the following measurements from
left to right:
Interval count, cache usage, and total number of virtual
mounts:
o Number of Recording Intervals - INTERVLS
o Total Cache Size (GB) - HHCAVTVC
o Avg Data Resident in Cache (GB) - HHCAVDRC
o Percent Cache Utilization - HHCPCCUT
o Avg Virtual Volumes in Cache - HHCAVVVC
o Avg Virtual Volume Size - HHCAVVSZ
o Total Virtual Mounts - HHCTVM
Virtual scratch (fast-ready) mount statistics:
o Virtual Fast-Ready Mounts - HHCFRM
o Avg Virtual Fast-Ready Mount Time - HHCAVFTM
Virtual cache hit mount statistics:
o Virtual Cache-Hit Mounts - HHCCHM
o Avg Virtual Cache-Hit Mount Time - HHCAVHTM
Virtual cache miss (recall) mount statistics:
o Virtual Recall Mounts - HHCCMM
o Avg Virtual Recall Mount Time - HHCAVRTM
Percentage of specific mounts that were cache misses,
resulting in the recall of a virtual tape from a physical
cartridge. This value is displayed as both a percentage and
a graphic:
o Pct Virtual Specific Mount Cache Misses - HHCPCVCM
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.
All report data is generated from the Hydra Hnode Cache
Activity (HVTHHA) file.
To produce the report:
1. Enter the CA MICS Workstation Facility (MWF)
2. Select option 2, CA MICS Information Center Facility
(MICF)
3. Select option 2, Database Inquiries
4. Select TAPLHD, IBM HYDRA Virtual Tape Mount Analysis,
in Catalog Group PERFORM
5. Complete the MICF Execution panel
6. Complete the specification panel. Refer to section
3.2.3.1.1, IBM Hydra MICF Inquiry Specification Panels,
for information about modifiable panel fields.
Inquiry : TAPLHD CA MICS Hydra Virtual Tape Mount Analysis Report Run Date: 29MAYyy Data Presented by Hour within Day Page 001 Cluster Identification #: 0 Grid Composite Identification: 10000 Report Start: 28MAYyy:00:00 Node Identification #: 0 Distributed Library Sequence #: 10001 Report End : 29MAYyy:00:00 Node Serial Number: 78-42FG3 Virtual Engine Code Level: 8.5.0.154 Timespan : DAYS --------------------------------------------------------------------------------------------------------------------------------- Day: 28MAYyy Data Avg Avg --Scratch--- -Cache Hit-- -Cache Miss- ------Percent Cache Misses------ Cache in Pct Vols Vol (Fast Ready (Recalls) 1 Numb Size Cache Cache in Size Total Scr Avg Hit Avg Miss Avg Pct 2 4 6 8 0 HOUR Intv (GB) (GB) Util Cache (MB) Mounts Total MM:SS Total MM:SS Total MM:SS Miss 0----0----0----0----0----0 ---- ---- ----- ----- ---- ------ ----- ------ ------ ----- ------ ----- ------ ----- ---- 0 4 6000 5181 86% 4795 1081 137 73 0:01 64 0:01 0 0:00 0% 1 4 6000 5248 87% 4910 1069 443 303 0:01 139 0:01 1 1:06 1% * 2 4 6000 5437 91% 5055 1076 311 203 0:01 107 0:01 1 1:22 1% * 3 4 6000 5405 90% 4977 1086 218 119 0:01 99 0:01 0 0:00 0% 4 4 6000 5300 88% 4958 1069 198 127 0:01 71 0:01 0 0:00 0% 5 4 6000 5083 85% 4647 1094 144 109 0:01 35 0:01 0 0:00 0% 6 4 6000 5030 84% 4564 1102 153 100 0:01 53 0:01 0 0:00 0% 7 4 6000 4963 83% 4489 1106 159 96 0:01 59 0:01 4 1:48 6% ** 8 4 6000 5065 84% 4546 1114 177 71 0:01 99 0:01 7 1:52 7% ** 9 4 6000 5101 85% 4549 1121 116 39 0:00 64 0:00 13 1:05 17% **** 10 4 6000 5147 86% 4587 1122 173 71 0:01 97 0:01 5 1:01 5% * 11 4 6000 5169 86% 4610 1121 219 66 0:01 147 0:01 6 1:26 4% * 12 4 6000 5196 87% 4635 1121 145 62 0:01 83 0:00 0 0:00 0% 13 4 6000 5211 87% 4643 1122 163 49 0:01 105 0:00 9 1:18 8% ** 14 4 6000 5258 88% 4693 1121 178 122 0:01 56 0:00 0 0:00 0% 15 4 6000 5262 88% 4694 1121 122 89 0:01 33 0:00 0 0:00 0% 16 4 6000 5284 88% 4727 1118 153 88 0:01 58 0:01 7 0:36 11% *** 17 4 6000 5294 88% 4746 1116 143 114 0:01 28 0:00 1 0:54 3% * 18 4 6000 5303 88% 4748 1117 174 89 0:01 84 0:01 1 1:24 1% * 19 4 6000 5332 89% 4758 1121 125 83 0:01 41 0:00 1 0:38 2% * 20 4 6000 5352 89% 4767 1123 160 105 0:01 49 0:01 6 0:39 11% *** 21 4 6000 5359 89% 4765 1125 120 83 0:00 33 0:00 4 1:06 11% *** 22 4 6000 5439 91% 4846 1123 293 214 0:01 60 0:01 19 0:48 24% ****** 23 4 6000 5457 91% 4722 1156 149 116 0:01 33 0:01 0 0:00 0% ---- ----- ----- ---- ------ ----- ------ ------ ----- ------ ----- ------ ----- ---- Tots 96 6000 5245 87% 4726 1110 4373 2591 0:01 1697 0:01 85 1:06 5% * ---------------------------------------------------------------------------------------------------------------------------------
Figure 3-24. IBM Hydra Virtual Tape Mount Analysis
|
Copyright © 2014 CA.
All rights reserved.
|
|