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Source: VCADAA file at the DETAIL timespan
VCA_VS file at the DETAIL timespan
Function: Graphically represents the effect of certain
space management actions on DASD volumes.
Many automated storage management software
products, such as DFHSM, allow users to delete or
migrate older data sets, and to release unused
space from data sets that have been allocated
incorrectly. This report allows users to simulate
these actions and then tune these threshold values
so that the desired result will be achieved.
Any combination of these different actions can be
simulated--automatic deletion, automatic
migration, and automatic release of over-allocated
space.
Features: Users installing automated storage management
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 that
their existing thresholds are effective.
As a user option, VSAM files can be included in
the analysis.
This chart would probably be run after appropriate
thresholds were defined, to provide a global view
of the effect of these values on each volume.
SMS
Issues: This chart can be used to simulate most of the
actions that are provided through the SMS
management class. This simulation will ensure the
values you specify in your management class
definition will achieve the desired result. After
implementation, the report can be used to monitor
the effect of proposed changes to the management
class definition before actually making the
change.
COLUMN DESCRIPTIONS
Volume Serial Number
The volume serial number of the storage medium.
Pie Slices
The entire pie represents the number of allocated
tracks on the volume that were candidates for
simulation. This excludes tracks allocated by
data sets that were excluded through data
filtering options, as well as tracks that were
unallocated on the volume. Each piece of the pie
represents that portion of tracks (both in number
and percentage of total) that would have been
affected by a particular simulation action.
Pie Labels
The section of the pie with the label 'ALLOCATED',
represents those tracks that were not affected by
the simulation, and still remain allocated on the
volume after the simulation completed. The other
slices represent the portion of tracks on the
volume that would have been freed due to
migration, deletion, or partial space release.
SPACE MANAGEMENT FUNCTION SIMULATION (STGEJB) 2 CA MICS StorageMate ABC CORPORATION System Identifier=SYS7 Volume Serial Number=LNR900 SUM PIE CHART OF TRACKS GROUPED BY ACTION ********************* ***** ***** *** *** *** **** ** ** ** *** ** ** * ** ALLOCATED * ** ** * * ** * ** * * * 10483 * * 81.99% * * * * * * * * * * + . . . . . . . . . . . . . . . . * * . 57 . . . . . . . RELEASED * .. 0.45% * * .. * * .. * * . . * * . . * * . .. 1855 * * . . 14.51% * * . . * * . . ** * .. . ** MIGRATED * . . ** * 390 . ** * 3.05% . ** ** . .. ** ** . . *** ** . . ** ** . *.* ** . *** *** .*** DELETED ***** ***** ********** ********** * VOLUME STATUS AFTER SIMULATION
Figure 4-64. Space Management Function Simulation / Chart
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