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Source: VCADAA file at the DETAIL timespan
VCA_VS file at the DETAIL timespan
Function: Graphically represents the age patterns of your
data sets by that reside on primary DASD volumes.
While this information provides valuable insights
into the currency of your data, it also helps you
establish thresholds used by automated software to
control the deletion, migration, space release,
and backup of your data.
Features: Users installing DFHSM or similar automated
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
charts to set new thresholds or to ensure their
Existing thresholds are effective.
Report options allow the age analysis to be done
for one of three values: creation date, retention
period, or date of last reference. VSAM files can
be included in the analysis.
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.
Color graphic and printer charts are supported.
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.
ELEMENT DESCRIPTIONS
Chart Title
This analysis can be used to analyze three
different data set age values, each with its own
unique meaning. The type of analysis that will be
done is determined by the value entered on the
report options screen, and is indicated by the
last line in the title.
PLOT 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. This is calculated
by subtracting the last reference date from the
date the information was collected.
PLOT BASED ON DATE OF CREATION
- Entering this value on the options screen causes
the days since the data set was created to be
computed and reported. This is calculated by
subtracting the creation date from the date the
information was collected.
PLOT BASED ON RETENTION PERIOD
- Entering this value on the options screen causes
the retention days value to be computed and
reported. This 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 chart.
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.
By 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, each chart will summarize the data sets
found on one volume. When summarization by volume
is selected, the Device Type of the volume will
also appear in the chart heading.
By Data Set Prefix
This represents the first node of the data set
name. Depending on the option chosen,
summarization can be requested based on the data
set prefix. In this case, each chart will
summarize all the data sets found with the
indicated prefix.
By 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, each chart will be used to represent
all the data sets found for a particular system.
By 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,
each chart will be used to represent all the data
sets assigned to a particular SMS Management
Class.
Vertical Axis
The vertical axis represents ranges of age values,
starting from 1 and ending with 360 days.
Horizontal Axis
Depending on the report option chosen, each
horizontal bar represents either the number of
data sets in this summarization group having an
age value within the range shown, or the amount of
space allocated by those data sets. Because this
is a cumulative chart, each horizontal bar will
include the values of the previous bars as well.
Other
At the right side of the chart, several columns
appear that make the chart easier to interpret.
These include the data sets/space in each group,
the cumulative value, the percentage of values in
each group, and the cumulative percentage.
Footnotes
One of two footnotes will appear at the bottom of
each chart, depending on the option selected:
NUMBER OF DATA SETS IN EACH AGE RANGE
The values appearing on the chart represent a
value of 1 for each data set in each age range.
ALLOCATED SPACE (KB) IN EACH AGE RANGE
The values appearing on the chart represent the
space allocated, in kilobytes, by the data sets
in each age range.
DELETION/MIGRATION/RELEASE THRESHOLDS (STGEJA) 2 CA MICS StorageMate ABC CORPORATION PLOT BASED ON DATE OF LAST REFERENCE SYSID=SYS7 Device Type=3380 Volume=LNR800 CUMULATIVE FREQUENCY BAR CHART MIDPOINT AGE Age FREQ CUM. PERCENT CUM. FREQ PERCENT | 1 |************ 92 92 16.67 16.67 2 |*************** 19 111 3.44 20.11 3 |*************** 2 113 0.36 20.47 4 |*************** 1 114 0.18 20.65 5 |***************** 13 127 2.36 23.01 6 |******************** 21 148 3.80 26.81 7 |********************** 20 168 3.62 30.43 10 |************************ 14 182 2.54 32.97 15 |****************************** 41 223 7.43 40.40 20 |******************************** 17 240 3.08 43.48 25 |********************************** 15 255 2.72 46.20 30 |************************************ 16 271 2.90 49.09 35 |************************************** 12 283 2.17 51.27 40 |**************************************** 14 297 2.54 53.80 45 |***************************************** 7 304 1.27 55.07 50 |***************************************** 7 311 1.27 56.34 55 |****************************************** 5 316 0.91 57.25 60 |******************************************* 5 321 0.91 58.15 65 |******************************************* 5 326 0.91 59.06 70 |********************************************** 21 347 3.80 62.86 75 |************************************************ 13 360 2.36 65.22 80 |************************************************* 11 371 1.99 67.21 85 |************************************************** 3 374 0.54 67.75 90 |*************************************************** 6 380 1.09 68.84 95 |*************************************************** 4 384 0.72 69.57 100 |***************************************************** 11 395 1.99 71.56 120 |********************************************************* 29 424 5.25 76.81 150 |*************************************************************** 47 471 8.51 85.33 180 |****************************************************************** 23 494 4.17 89.49 210 |********************************************************************** 31 525 5.62 95.11 240 |************************************************************************ 17 542 3.08 98.19 270 |************************************************************************* 8 550 1.45 99.64 300 |************************************************************************* 1 551 0.18 99.82 320 |************************************************************************** 1 552 0.18 100.00 360 |************************************************************************** 0 552 0.00 100.00 ----+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+-- 30 60 90 120 150 180 210 240 270 300 330 360 390 420 450 480 510 540 CUMULATIVE FREQUENCY NUMBER OF DATA SETS IN EACH AGE RANGE
Figure 4-35. Deletion/Migration/Release Thresholds / Chart
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