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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 chart 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
chart can help identify groups that are receiving
poor response times, so that further research can
be done to identify volumes or volume groups that
are delivering poor service.
Features: This chart 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. Both color graphics and printer graphics
output are supported.
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, because 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 chart
occurred.
Zone
If summarization by ZONE was specified on the
report options screen, this identifier will list
the ZONE value for which this chart applies.
Hour
If summarization by Hour was specified on the
report options screen, this identifier will list
the hour for which this chart applies.
Vertical Axis
The entries on the vertical axis represent the
different groups of data sets for which average
response times are being reported. These groups
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 chart, grouping can also be
requested at the DFSMS Storage Class level. When
that option is selected, the value 'SC=' will
precede the storage class name on the chart.
Horizontal Axis
The bar value on the horizontal axis represents
the average response times being received by each
reporting group, expressed in thousands of a
second (milliseconds). 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.
Other
A column on the right side of the chart also
reports each average response time as a numeric
value.
DATA SET PERFORMANCE (STGEPA) 2 CA MICS StorageMate ABC CORPORATION System Identifier=SYS7 Date=22AUG07 Hour=10 BAR CHART OF RESPTIME OWNER User RESPTIME | CUSTOMER-SUPPORT |******************************************************************************** 20.0 | DEVELOPMENT |********************************************************************************* 20.2 | DISTRIBUTION-LIB |******************************************************************************** 20.1 | MARKETING-SALES |******************************************************************************** 20.0 | SYSTEM-DATA |********************************************************************************** 20.5 | --------+-------+-------+-------+-------+-------+-------+-------+-------+-------+-- 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 RESPONSE TIME IN MILLISECONDS
Figure 4-33. Data Set Performance / Chart
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