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Source: VCADAA file at the DETAIL timespan
VCA_VS file at the DETAIL timespan
Function: Provides a summary of the Age and Size of data
sets and how each grouping (cluster) is actually
mapped into each Storage Group. This determines
how well the DFSMS storage definitions are
actually being used and where potential problems
might reside.
Simple statistics (minimum, average and maximum)
for both Age and Size are provided to aid in this
process.
The report format is controlled by limiting the
number of storage groups to be displayed in the
report. This filtering is done by selecting those
storage groups that represent at least 2 percent
of all data sets and combining all others into a
single definition. Additionally, all non-SMS
managed data sets are grouped together as well.
Features: An additional element for summarizing and
reporting the allocation data can be specified.
By default, the DFSMS Storage Class is used to
summarize allocations across storage groups to
better verify the DFSMS definitions.
SMS After SMS implementation, the report is useful as
Issues: part of the ongoing monitoring and tuning of the
SMS system.
COLUMN DESCRIPTIONS
The valid data element choices for primary summarization
key are: STORAGE (storage class); MANAGE (management
class); DATA (data class); and ACCOUNT, one of the
VCAACTx elements. The default value is STORAGE.
Following is a list of field descriptions for the
summarization elements.
Storage Class
The name of the DFSMS Storage Class assigned to
this data set. A value of '(NONE)' indicates that
no value has been assigned.
Management Class
The name of the DFSMS Management Class assigned to
this data set. A value of '(NONE)' indicates that
no value has been assigned.
Data Class
The name of the DFSMS Data Class assigned to this
data set. A value of '(NONE)' indicates that no
value has been assigned.
Account fields
These are the VCAACTx elements that were specified
during VCA component installation. Any of the
defined account codes may be chosen; however, the
report design limits the display of any
summarization elements to 12 bytes.
Storage Group
The name of the DFSMS Storage Group assigned by
the installation. Only those Storage Groups that
represent at least 2 percent of the allocated
space are selected and then only the top 8 groups
are actually displayed. All others are grouped
together as "OTHER".
Number of Datasets
The number of data sets within the summarization
group.
Age (in days) Statistical Summary Age is the number of
days since the last reference of the data set
being processed. It is computed by subtracting
the last reference date from the current date. If
the result is missing, then the same calculation
is attempted using the data set creation date.
Observations that still have missing values after
both attempts are deleted. The Age values are
displayed as Minimum, 1st Quartile (25th pctl.),
median, 3rd Quartile (75th pctl.) and Maximum.
Allocated Space (size) in Megabytes This is derived from
element DAAALLSP, presented as Minimum, Average
(mean) and Maximum values, and additionally
summarized. This total size depicts how much
allocated space is represented by the cluster
within a given storage group.
Weighted Allocated Space
The allocated space of each data set is first
weighted by its calculated Age and then
accumulated together within each cluster. The
accumulated measurements for each cluster are then
presented both as an Average (mean) and Total
values. This is done to quantify the effect of
the size and ages of all data sets taken together
and provides a simple method to understand where
the "pain" is. The expression "pain" refers to
the potential impact one set of data sets might
have on the installation as a whole. For example,
a cluster representing a group of poorly managed
data sets might consist of many small data sets
that are fairly new, and therefore cause minimal
"pain." Conversely, a group of rather large data
sets that are old can easily result in a large
impact on the installation.
SMS CLASS USAGE (STGELE) CA MICS StorageMate AFTER COMPLEX SAS V8.2 Analysis of DF/SMS Space Utilization Report Date: 06/25/2004 ------------------------------------------------------------------------------------------------------------------------- | | | | | Weighted Allocated | | | | Age (Days) | Allocated Space (MB) | Space (MB) | | | No. of |-----------------------+----------------------------------+----------------------| | |Datasets|Minimum|Average|Maximum|Minimum|Average|Maximum| Total | Average | Total | |----------------------------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| |(NONE) |DBDSALC |4 | 1| 1,381| 1,381| 1,381| 42| 42| 42| 42| 58,687| 58,687| | |--------+----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | |MEDDSALC|1 | 2| 21| 29| 37| 1| 7| 14| 14| 258| 515| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |4 | 2| 37| 37| 37| 27| 27| 27| 54| 1,006| 2,012| | |--------+----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | |MISCSMS |3 | 14| 1,157| 1,157| 1,157| 0| 0| 0| 1| 75| 1,049| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |4 | 1| 713| 713| 713| 34| 34| 34| 34| 24,239| 24,239| | |--------+----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | |SMLDSALC|1 | 1| 28| 28| 28| 1| 1| 1| 1| 16| 16| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |2 | 1| 771| 771| 771| 1| 1| 1| 1| 437| 437| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |8 | 1| 27| 27| 27| 363| 363| 363| 363| 9,794| 9,794| | |--------+----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | |TSOSTOR |1 | 12| 36| 171| 281| 0| 0| 3| 4| 30| 361| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |2 | 6| 338| 454| 619| 0| 0| 0| 1| 55| 332| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |3 | 1| 1,448| 1,448| 1,448| 0| 0| 0| 0| 328| 328| | |--------+----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | |(OTHER) |1 | 1| 51| 51| 51| 5| 5| 5| 5| 249| 249| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |2 | 3| 464| 465| 465| 0| 0| 0| 1| 105| 316| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |4 | 3| 335| 335| 335| 25| 25| 25| 76| 8,541| 25,624| | | |----------+--------+-------+-------+-------+-------+-------+-------+----------+---------+------------| | | |6 | 1| 2,597| 2,597| 2,597| 0| 0| 0| 0| 147| 147| ------------------------------------------------------------------------------------------------------------------------- (sample report truncated at first page for documentation purposes)
Figure 4-59C SMS Class Usage / Analysis of DF/SMS Space Usage
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