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Source: BATWDA file at the DAYS timespan
HARDVA file at the DAYS timespan
WLMSEC file at the DAYS timespan
Function: Provides a graphic view of the I/O activity
against each DASD volume group, based on the EXCP
counts stored by CA MICS in the BATWDA and HARDVA
files.
Each user of the volume group is identified by the
WLM Service Class name. This provides the ability
to monitor each volume group during various time
periods.
Features: For SMS users, grouping for this report is
automatically done based on the storage group
assigned to each volume.
For non-SMS users, grouping is done by means of a
volume table that is created by the StorageMate
product and maintained by you.
Even after volume pooling is implemented, both SMS
and non-SMS users can use this volume table to
simulate proposed changes before they are made.
Three different CA MICS files are combined to
produce this chart. The user can set the
summarization level to day, zone, or hour.
The input data can also be filtered by hour, zone,
data and/or the name of the volume group. This
provides a wide variety of data views, from very
broad to very narrow.
Both color graphic and printer plots are
supported.
SMS Prior to SMS implementation, this report could be
Issues: used to simulate storage groups, making sure the
I/O activity against these groups is distributed
as expected.
After implementation, the same report could be
used to monitor and tune each group, and to
simulate proposed changes to the groups.
COLUMN DESCRIPTIONS
Date
The date the activity shown on this chart
occurred.
Volume Group Name
The name of the Volume Group supplying the
information for this chart. Volume group is
determined automatically for SMS users; it is the
SMS Storage Group. For non-SMS users, volumes can
be assigned to volume pools (at least for
reporting purposes) by specifying a Volume Group
Table name on the report options screen.
Zone
If summarization by ZONE was specified on the
report options screen, the data on this chart will
only apply for this ZONE.
Hour
If summarization by Hour was specified on the
report options screen, the data on this chart will
only apply for this hour.
Pie Slices
Each slice represents the number of I/O requests
for this volume group received during this
measurement interval that originated from a
particular workload. The percentage value
represents the percentage of all requests received
that originated from each workload.
Pie Labels
Each slice identifies the name of the workload
that issued I/O requests to the volumes in this
volume group. Similar tasks in MVS are assigned
to a common WLM Service Class, which is controlled
and reported by means of a service class name. A
value of '(SYSTEM)' in the label is used to
represent uncaptured I/O requests. This refers to
I/O requests that are captured in the totals from
RMF for the device, but are not captured by SMF
and assigned to the proper user. This is a
'normal' occurrence for all MVS systems, as some
work performed by the operating system is
considered to be overhead, and is not captured in
job accounting.
VOLUME GROUP ACTIVITY BY WORKLOAD (STGEHB) 2 CA MICS StorageMate ABC CORPORATION System Identifier=SYS7 Date=18MAY90 Volume Group=CICS-PRD Hour=10 SUM PIE CHART OF WDAEXCPS GROUPED BY WLMCLASS ********************* ***** ***** *** *** (SYSTEM) **. *** ** . *** ** . ** ** . *** ** .. ** * . ** * . 10207.1 ** ** . 33.43% * * .. ** * . ** * . * * . * * . * * .. * * . * * . * * . * BAT/DEF * 9838.29 + . . . . . . . . . . . * * 32.22% . . . . . . . * . * * . * * . * * . * * . * * . * * .. * * . * * . ** * . ** * . ** * . 10390.8 ** * . 34.03% ** ** . ** ** . *** ** .. ** **. *** ** *** *** *** ***** ***** TSO/DEF ********** ********** * DISTRIBUTION OF I/O BY WORKLOAD
Figure 4-72. Volume Group Activity by Workload / Chart
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