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Source: VCADAA file at the DETAIL timespan
VCA_VS file at the DETAIL timespan
Function: Identifies the age patterns of the data sets that
reside on your primary DASD volumes.
Identifies the minimum, maximum, and average dates
for each group, plus a frequency range.
Features: Users installing DFSMS, DFHSM, or similar products
can choose thresholds that allow them to start
using their new software sooner, without having an
adverse effect on data availability.
Users already using automated products can use the
chart to set new thresholds or to ensure their
existing thresholds are effective.
VSAM files can be included in the analysis. Panel
options allow the age analysis to be done for one
of three values: creation date, retention period,
or date of last reference.
Analysis can be done based on the number of data
sets in each age range, or by the amount of space
allocated by those data sets. Both types of
reports can be produced in one report execution.
SMS
Issues: Identification of common age patterns provided by
the report will be useful when planning SMS
management classes, because most of the services
provided by the class are triggered by the age or
usage of the data set. Existing SMS users can use
this report to monitor their existing data and to
ensure that the volumes specified in the
management classes are working as expected.
COLUMN DESCRIPTIONS
Report Title
This analysis can be used to analyze three
different data set age values, each with its own
unique meaning. The type of analysis done is
determined by the value entered on the report
options screen, and is indicated by the last line
in the title, as follows:
SUMMARY BASED ON DATE OF LAST REFERENCE
- Entering this value on the options screen causes
the days since each data set was last referenced
to be computed and reported. The value is
calculated by subtracting the last reference
date from the date the information was
collected.
SUMMARY BASED ON DATE OF CREATION
- Entering this value on the options screen causes
causes the days since the data set was created
to be computed and reported. The value is
calculated by subtracting the creation date from
the date the information was collected.
SUMMARY BASED ON RETENTION PERIOD
- Entering this value on the options screen causes
the retention days value to be computed and
reported. The value is calculated by
subtracting the creation date of the data set
from the expiration date. If no expiration date
was specified, this value is set to zero.
The option chosen for the analysis is also
reflected in the fourth title line of each
report. Throughout the remainder of this
discussion, the word 'age' will be used when
describing the operation of this report. Keep
in mind that this actually can mean three
different things, depending on the option
chosen.
Volume Serial Number
The volume serial number of the storage medium.
Depending on the option chosen, summarization can
be requested based on volume serial number. In
this case, the volume serial number will appear
under this column, and the statistics in of the
report line will apply to this volume. When
volume summarization is selected, the Device Type
of each volume will also appear in the heading.
Data Set Prefix
This represents the first node of the data set
name. Depending on the option chosen,
summarization can be requested based on data set
prefix. In this case, the prefix will appear
under this column, and the statistics in the
report line will apply to this prefix.
SYSID
The translated system identification that was
derived from ORGSYSID by the CA MICS SYSID
Translation process. Depending on the option
chosen, summarization can be requested for all the
data sets residing on a single MVS system. In
this case, the SYSID of the system will appear
under this column, and the statistics in the
report line will apply to this system.
Management Class
Depending on the option chosen, summarization can
be requested based on the SMS Management Class
assigned to each managed data set. In this case,
the Management Class name will appear under this
column, and the statistics in the report line will
apply to this class.
Valid Count
The number of data sets represented in this
summarization level that had valid dates, and for
which a valid age could be determined. These are
the data sets that were included in the analysis
for this summarization level.
Invalid Count
The number of data sets represented in this
summarization level that were invalid, and for
which a valid age could not be determined. These
data sets are dropped, and were not included in
the analysis for this summarization level.
Avg Num. Days
The average age value for all the data sets
included in this level of summarization. This is
calculated by dividing the sum of all the data set
ages by the number of data sets in the
summarization. This value is represented as a
whole number of days.
Min. Num. Days
The smallest age value found within all the data
sets included in this level of summarization.
This value is represented as a whole number of
days.
Max. Num. Days
The largest age value found within all the data
sets included in this level of summarization.
This value is represented as a whole number of
days.
You will see one of the following titles depending on
the report options you selected:
Cumulative Percentage of Data Sets Referenced in Range of
Days
This represents a cumulative percentage
distribution line, based on the number of days
since a data set was last referenced. For
example, a value of 39 in the 181-210 column
indicates that 39% of the data sets in this
summary group have been referenced sometime in the
past 210 days. Subtracting the previous column
value from any column can be used to compute the
percentage of data sets occurring in that column.
Cumulative Percentage of Space Referenced in Range of
Days
This represents a cumulative percentage
distribution line, based on the number of days
since a data set was last referenced. For
example, a value of 39 in the 181-210 column
indicates that 39% of the allocated space in this
summary group belongs to data sets that have been
referenced sometime in the past 210 days.
Subtracting the previous column value from any
column can be used to compute the percentage of
data sets occurring in that column.
Cumulative Percentage of Data Sets Created in Range of
Days
This represents a cumulative percentage
distribution line, based on the number of days
since a data set was created. For example, a
value of 75 in the 31-60 column indicates that 75%
of the data sets in this summary group were
created sometime in the past 60 days. Subtracting
the previous column value from any column can be
used to compute the percentage of data sets
occurring in that column.
Cumulative Percentage of Space Created in Range of Days
This represents a cumulative percentage
distribution line, based on the number of days
since a data set was created. For example, a
value of 75 in the 31-60 column indicates that 75%
of the space allocated in this group is allocated
to data sets created sometime in the past 60 days.
Subtracting the previous column value from any
column can be used to compute the percentage of
data sets occurring in that column.
Cumulative Percentage of Data Sets Retained in Range of
Days
This represents a cumulative percentage
distribution line, based on the number of
retention days specified when a data set was
created. For example, a value of 58 in the 61-90
column indicates that 58% of the data sets in this
summary group were given retention periods of 60
days or less when they were created. Subtracting
the previous column value from any column can be
used to compute the percentage of data sets
occurring in that column.
Cumulative Percentage of Space Retained in Range of Days
This represents a cumulative percentage
distribution line, based on the number of
retention days specified when a data set was
created. For example, a value of 58 in the 61-90
column indicates that 58% of the space allocated
in this group belongs to data sets that were given
retention periods of 60 days or less when they
were created. Subtracting the previous column
value from any column can be used to compute the
percentage of data sets occurring in that column.
DELETION/MIGRATION/RELEASE THRESHOLDS (STGEJA) 1 CA MICS StorageMate ABC CORPORATION SUMMARY BASED ON DATE OF LAST REFERENCE ----------------------------------------- System Identifier=SYS7 Device Type=3380 ------------------------------------------------ Volume Valid Invalid Avg. Min. Max. +-------- Cumulative Percentage of Data Sets Referenced in Range of Days --------+ Serial Count Count Num. Num. Num. 00- 08- 15- 22- 31- 61- 91- 121- 151- 181- 211- 241- 271- 301- 331- Number Days Days Days 07 14 21 30 60 90 120 150 180 210 240 270 300 330 365 LNR800 552 12 71 0 338 29 38 43 49 58 68 73 79 88 91 96 98 100 100 100 LNR801 110 7 26 0 147 50 62 68 70 83 89 96 100 100 100 100 100 100 100 100 LNR803 324 13 38 0 334 38 49 55 63 80 87 91 95 97 98 100 100 100 100 100 LNR804 345 7 36 0 331 43 53 59 67 76 87 91 95 98 99 100 100 100 100 100 LNR806 317 21 44 0 331 37 46 54 61 71 79 90 94 97 98 100 100 100 100 100 LNR807 298 12 43 0 331 37 46 51 59 73 82 89 94 98 99 100 100 100 100 100 LNR900 492 12 37 0 320 38 49 57 63 76 85 95 97 98 99 99 100 100 100 100 LNR901 549 6 75 0 316 24 32 35 40 51 58 79 81 87 93 97 99 99 100 100 LNR902 342 6 48 0 1086 38 46 52 58 70 78 94 95 97 98 99 99 99 99 99 LNR903 499 14 43 0 1084 33 44 51 58 74 83 94 95 97 99 99 100 100 100 100 LNR904 237 8 60 0 1084 35 49 52 59 68 73 79 83 92 96 98 98 98 99 99 LNR905 325 7 34 0 399 42 54 59 68 75 91 94 95 97 99 99 100 100 100 100 LNR906 195 6 41 0 1086 46 56 64 69 75 89 91 92 96 97 98 99 99 99 99 LNR907 193 4 47 0 1086 41 48 52 58 70 87 89 92 96 97 99 99 99 99 99 LNR908 319 20 41 0 481 38 48 56 61 71 84 95 96 97 98 99 99 99 99 99 LNR909 132 17 95 0 1086 33 43 48 52 61 73 83 86 88 89 93 93 93 93 94 -------- ------ ------ DEVTYPE 5229 172 -------- ------ ------ SYSID 5229 172
Figure 4-36. Deletion/Migration/Release Thresholds / Summary
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