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Source: VCAVOA file at the DETAIL timespan
Function: This facility allows the storage administrator to
monitor key storage indicators on a day-by-day
basis. These indicators enable the user to
project short-term storage needs, both at the
hardware unit level (volume, volume group, or
device type) and the system level. The indicators
reported by this facility are also useful for
detecting problems with storage resources that are
not being used efficiently. These reports, along
with the tasks such as Monthly DASD Resource Usage
reports, provide both a short view and a long view
of storage capacity and performance problems,
measured at the hardware level.
The Daily/Monthly DASD Resource Usage reports
complement the Daily/Monthly Application Resource
Usage reports to give a complete picture of
storage usage and capacity. While the application
reports tend to measure storage capacity and
consumption at the application level, the DASD
reports take a more hardware-oriented look at
similar data. These reports are useful for tasks
such as planning for new DASD or balancing volumes
between volume groups or SMS storage groups. Both
sets of reports allow you to measure and control
growth at the application and hardware levels.
The types of data that can be selected for
reporting include the number of data sets, the
amount of space being allocated, percentages of
data sets and space in certain categories, the
amount of allocated versus used space, and other
measures of performance and capacity.
Features: Summarization options allow you to analyze the
data based on volume serial number, device type,
volume group or SMS storage group, or to provide
totals for each system.
Data filtering allows you to include data from
selected groups. For example, you can choose to
report on specific volumes, device types, or SMS
storage groups.
Output reports from this facility include tabular
reports, printer plots, or color graphic plots.
When plots are requested, up to nine different
elements can be plotted on the same chart.
Many users choose to run the CA MICS DASD
Collector multiple times during the day and then
combine those multiple measurements into the same
cycle of CA MICS data. The reports in this
facility will detect this condition and alter
their output to reflect this "detail mode" of
operation. The values on each report and graph
will then reflect individual measurements for each
day rather than just one value per day. Detail
mode will be activated when 3 or more unique
measurements are found for the same volume on any
one day. It is suggested you do not combine
detailed and normal data cycles in the same report
execution.
SMS
Issues: The ability to summarize by SMS storage groups
makes it easy to monitor the short-term activity
within each of your defined groups. Many of the
elements you can select for reporting are useful
for monitoring an SMS migration effort, or to make
sure SMS is operating correctly after migration is
complete. Using a Volume Group Table, alternate
storage group configurations may be designed and
simulated before being implemented.
ELEMENT DESCRIPTIONS
SYSID
This value appears at the top of each page and
identifies the System Identifier (system) to which
this data applies.
Date
When detailed reporting is active, the date will
appear at the top of each page in the format
'ddmmmyy'. All data on the remainder of the page
will apply to this date.
Volume
Volume Group
Device Type
Unless summarization by SYSID only is chosen, the
descriptive line at the top of each page will also
indicate the summary group to which the values on
this plot apply. Depending on the report option
chosen, this summarization will be done by volume,
volume group (SMS storage group), or device type.
The label to the left of the summary value will be
one of the values shown above, depending on the
summarization option chosen.
Vertical Axis (Value)
The numeric values distributed vertically down the
left side of each page represent the scale of the
numeric values being plotted on that page. When
requesting color graphics plots, you can specify
the values that will appear on this axis. This
should be done with care, because all plots and
groups will have to adapt to the values you
specify. For printer plots, or when values are
not specified, SAS will generate the values
automatically, based on the content of the plotted
data. We suggest that these SAS defaults be used
whenever possible, as they will avoid many
potential problems. Care should also be taken
when specifying multiple elements on one plot,
that the elements chosen will have a similar range
of values.
Horizontal Axis (Date)
Plots on the horizontal axis represent the date
corresponding to the value being plotted. Each
date is presented in the format 'ddmmmyy'. The
number of entries appearing on the horizontal axis
is determined by the number of cycles of CA MICS
data specified as input to the inquiry.
Horizontal Axis (Time)
When detailed reporting is active, the plots on
the horizontal axis represent the measurement time
corresponding to the value being plotted. Each
time is presented in the format 'hh:mm:ss'. The
number of entries appearing on the horizontal axis
is determined by the number of different
measurements found each particular date.
Footnotes
The footnotes section of each graph is important,
as it indicates the names of the data element(s)
that are plotted on the graph. Up to nine
elements can be plotted on the same graph, in
which case nine footnotes will appear at the
bottom of each page. For printer plots, an
alphabetic character ranging from A through I will
appear to the left of each description,
identifying the character used on the plot to
represent that particular element. On color
graphic plots, the letter does not appear, as the
color of the footnote should correspond with the
color of the plot point or line on the graph. If
different colors do not appear for each point and
footnote, modify your MICF options to specify
different colors. A brief description of the
possible values in the footnote section, and what
those values represent, is given below:
Data Set Count: Total
Represents the total number of data sets
found in the input data for this particular
summary group.
Data Set Count: SMS-Managed
Represents the number of data sets found in
the input data for this particular summary
group that are managed by SMS.
Data Set Count: Unmanaged
Represents the number of data sets found in
the input data for this particular summary
group that are not managed by SMS.
Data Set Count: Non-VSAM
Represents the number of data sets found in
the input data for this particular summary
group that are not VSAM data sets.
Data Set Count: VSAM
Represents the number of data sets found in
the input data for this particular summary
group that are VSAM data sets.
Space Allocated (MB): Total
Represents the total space allocated, in
megabytes, by all the data sets found in the
input data for this particular summary group.
Space Allocated (MB): Managed
Represents the total space allocated, in
megabytes, by all the data sets found in the
input data for this particular summary group
that are managed by SMS.
Space Allocated (MB): Unmanaged
Represents the total space allocated, in
megabytes, by all the data sets found in the
input data for this particular summary group
that are not managed by SMS.
Space Allocated (MB): Non-VSAM
Represents the total space allocated, in
megabytes, by all the non-VSAM data sets found
in the input data for this particular summary
group.
Space Allocated (MB): VSAM
Represents the total space allocated, in
megabytes, by all the VSAM data sets found in
the input data for this particular summary
group.
Percentage of Data Sets: Managed
Represents the percentage of all the data sets
found in the input data for this particular
summary group that are managed by SMS.
Percentage of Data Sets: Unmanaged
Represents the percentage of all the data sets
found in the input data for this particular
summary group that are not managed by SMS.
Percentage of Data Sets: Non-VSAM
Represents the percentage of all the data sets
found in the input data for this particular
summary group that are non-VSAM data sets.
Percentage of Data Sets: VSAM
Represents the percentage of all the data sets
found in the input data for this particular
summary group that are VSAM data sets.
Percentage of Space: Managed
Based on the total space allocated by all the
data sets in this summary group, the
percentage of that space belonging to data
sets that are managed by SMS.
Percentage of Space: Unmanaged
Based on the total space allocated by all the
data sets in this summary group, the
percentage of that space belonging to data
sets that are not managed by SMS.
Percentage of Space: Non-VSAM
Based on the total space allocated by all the
data sets in this summary group, the
percentage of that space belonging to data
sets that are not VSAM.
Percentage of Space: VSAM
Based on the total space allocated by all the
data sets in this summary group, the
percentage of that space belonging to data
sets that are VSAM.
Percentage of Space Used: All Data
Represents the percentage of space allocated
versus used for all the data sets found in the
input data for this particular summary group.
This is calculated by dividing the total
tracks used by the data sets in this group by
the total tracks allocated. Note that HSM
data sets are not included in this
calculation.
Percentage of Space Used: Non-VSAM
Represents the percentage of space allocated
versus used for the non-VSAM data sets found
in the input data for this particular summary
group. This is calculated by dividing the
total tracks used by the non-VSAM data sets in
this group by the total tracks allocated by
the non-VSAM data sets. Note that HSM data
sets are not included in this calculation.
Percentage of Space Used: VSAM
Represents the percentage of space allocated
versus used for the VSAM data sets found in
the input data for this particular summary
group. This is calculated by dividing the
total tracks used by the VSAM data sets in
this group by the total tracks allocated by
the VSAM data sets. Note that HSM data sets
are not included in this calculation.
Total Storage Capacity (MB)
Represents the total published storage
capacity for all the volumes in this
particular summary group, expressed in
megabytes.
Total Capacity Allocated (MB)
Represents the total amount of space within
this particular summary group that has been
allocated, and is no longer available for
allocation by other data sets. This value is
expressed in megabytes, and represents the
space allocated by data sets and system areas
such as VTOCs.
Total Capacity Free (MB)
Represents the total amount of space within
this particular summary group that is
available for allocation by other data sets.
This value is expressed in megabytes.
Percentage of Capacity Allocated
Represents the percentage of space within this
particular summary group that has been
allocated, and is no longer available for
allocation by other data sets. This value
represents the space allocated by data sets
and system areas such as VTOCs.
Percentage of Capacity Free
Represents the percentage of space within this
particular summary group that is available for
allocation by other data sets.
Average Fragmentation Index
Represents the average of all the
fragmentation indexes for all the volumes in
this summary group. The fragmentation index
is used as a measurement of space
fragmentation on each volume, with a low
number indicating little fragmentation, and
higher numbers indicating greater amounts of
fragmentation.
Free VTOC Index Records
Represents the total number of free VTOC index
records for all of the volumes in this
particular summary group. For volumes with
indexed VTOCs, this number indicates the
amount of index expansion space available.
DAILY DASD RESOURCE USAGE (STGEJE) CA MICS StorageMate ABC CORPORATION SYSID=IMS8 Volume Group=TEMP | A A A A | | | 5500 + | B | | B | 5250 + B | | | | 5000 + | | V | a | l 4750 + u | e | | | 4500 + | | | | 4250 + | | | | 4000 + | | | | B 3750 + --+-----------------------------+-----------------------------+-----------------------------+---- 01JAN07 02JAN07 03JAN07 04JAN07 Date A = Total Storage Capacity (MB) B = Total Capacity Free (MB)
Figure 4-22. Daily DASD Resource Usage / Plot
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