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Source: HARDVA file at the DAYS timespan
VCADAA file at the DETAIL timespan
VCA_VS file at the DETAIL timespan
Function: This report estimates the average response time
being received by each department or group. This
is done by determining the response time being
received for each active data set, based on its
SYSID and VOLSER, and then finding the average of
those values for each summary group. While this
is not as accurate as response time analysis at
the data set level, it does indicate general
trends and potential problem areas. Use of this
report can help identify those groups that are
receiving poor response times, and can help
isolate volumes or volume groups that are
delivering poor service.
Features: This report could be run regularly to monitor
service times, with more detailed reporting being
done when problems are detected. A wide variety
of filtering, summarization and reporting options
allow many views of the same data to be obtained.
This allows problem research to be system-wide or
to be isolated to specific users, volumes, or time
periods. Data set grouping can be done using a
single or range of data set nodes, a single or
range of account fields, or through an external
table.
Generation of the summary report is automatic.
SMS
Issues: Users planning their SMS Storage Classes can
approximate the average service currently being
delivered to each department or application. This
is important to know, as the desired response time
for a group of related data sets is specified as
part of the Storage Class definition. After SMS
implementation is complete, this report could be
used to monitor whether the expected response
times are being delivered.
COLUMN DESCRIPTIONS
Date
The date on which the activity shown on this
report occurred.
Zone
If summarization by ZONE was specified on the
report options screen, this identifier will list
the ZONE value for which this data applies.
Hour
If summarization by Hour was specified on the
report options screen, this identifier will list
the hour for which this data applies.
User
Identifies the user to which this report line
applies. This ownership can be established using
one or more of the VCA account fields, one or more
of the data set name nodes, or using data
extracted from a Data Set Group table. For this
report, ownership can also be requested at the
DFSMS Storage Class level. When that option is
selected, the value 'SC=' will proceed the storage
class name in this column.
Data Sets Included
Represents the number of data sets in this
summarization group that were included in the
analysis. To make the estimate of response time
more accurate, only those data sets that have been
referenced recently are included in the analysis.
This criteria for determining this, along with
other filtering criteria that effect this value,
are specified on the report options screen.
Volumes Included
Represents the number of unique volumes on which
the data sets belonging to this summarization
group were found.
Average Response Time
The average response time in milliseconds being
received by the data sets in this summarization
group. This is calculated by dividing the sum of
the response times for all the data sets in this
group by the number of data sets. Response time
for each data set is determined as the average
response time for the volume on which the data set
resides. Note that filtering criteria can be
specified to limit this calculation to specific
time periods.
Best Response Time / From Volume
Reports the best response time that was being
received by all the data sets in this group, and
the volume that was providing that response time.
Worst Response Time / From Volume
Reports the worst response time that was being
received by all the data sets in this group, and
the volume that was providing that response time.
DATA SET PERFORMANCE (STGEPA) 1 CA MICS StorageMate ABC CORPORATION ------------------------------------------- System Identifier=SYS7 Date=22AUG07 Hour=10 -------------------------------------------- User Data Sets Volumes | Average | Best From | Worst From | Included Included | Response | Response Volume | Response Volume | | Time | Time | Time | CUSTOMER-SUPPORT 24 9 | 20.0 | 14.9 WRK001 | 23.8 DSTLB4 | DEVELOPMENT 399 10 | 20.2 | 13.7 PROD73 | 31.1 WRK005 | DISTRIBUTION-LIBS 18 8 | 20.1 | 15.8 PFD003 | 21.7 RES704 | MARKETING-SALES 359 10 | 20.0 | 15.2 WRK002 | 23.0 WRK004 | SYSTEM-DATA 18 7 | 20.5 | 16.0 DXT937 | 19.8 TMPLIB |
Figure 4-34. Data Set Performance / Summary
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