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Source: VCA_VS file at the DETAIL timespan
Function: Allows you to identify common patterns of data set
attributes within your VSAM data sets. This is
useful in identifying data sets with similar
attributes that may have similar processing
requirements.
This report also helps to identify groups of data
sets that have been allocated with attributes that
may cause performance problems or poor space
utilization.
Features: You can monitor the use of different attributes by
your users, identifying those that could result in
performance or space problems.
You can also choose to drop those groups that only
represent a small percentage of your data sets
from the report.
After running this summary report, three
additional reports that expand on the information
provided in the summary can be requested.
Generation of the summary report is automatic.
SMS
Issues: SMS allows similar data sets to be managed under
one data class; this report helps users identify
and define those classes.
You can determine the most common groups of data
sets, thus allowing data sets in those groups to
be automated quickly.
Minimum, maximum, and average space allocation is
also computed and reported for each group, as SMS
often allows default space values to be assigned
based on the attributes of a data set.
COLUMN DESCRIPTIONS
Report Group
Represents a group of data sets that have
identical attributes, as defined by the columns
'VSAM Org. Type' through 'Shr Opt Sys' on each
report line. Report Group is important, as it is
used in all other VSAM Attributes reports to refer
to this common group of data sets. The number of
report groups is determined by the characteristics
of the data analyzed, as well as by the percentage
cutoff values entered on the report option screen.
# of Data Sets
The number of data sets within the data analyzed
that contained attributes identical to those
defined by this group.
% of Data Sets
The percentage of data sets within the data
analyzed that were assigned to this report group.
Note that any data sets excluded by filtering
values on the report option panel are not included
when calculating this percentage.
VSAM Org. Type
Defines the VSAM organization type of the data
sets in this group. One of the following values
should be present:
KS - Key Sequence Data Set
ES - Entry Sequence Data Set
RR - Relative Record Data Set
LS - Linear Data Set
Note that all the data sets assigned to this
report group have the same VSAM organization
listed under this column.
C. I. Size
Note that all the data sets assigned to this
report group have the same control interval size
listed under this column.
LRECL
The maximum length of each logical record in this
data set. Note that all the data sets assigned to
this report group have the same logical record
length listed under this column.
Imbed
Note that all the data sets assigned to this
report group have the same imbed attribute listed
under this column.
Replicate
Contains a value of 'Y' if the replication
attribute was specified for this data set, and a
value of 'N' if it was not. If this column is
blank, the replication attribute is not valid for
this type of data set. Note that all the data
sets assigned to this report group have the same
replicate attribute listed under this column.
Rel. Key Pos.
The relative position of the first byte of the key
within the logical record for ISAM files. Note
that all the data sets assigned to this report
group have the same relative key position listed
under this column.
Key Length
The length of the key associated with each data
block in a keyed data set. Note that all the data
sets assigned to this report group have the same
key length listed under this column.
% Free C. I.
Note that all the data sets assigned to this
report group have the same free control interval
percentage value listed under this column.
% Free C. A.
Note that all the data sets assigned to this
report group have the same free control area
percentage value listed under this column.
Shr Opt Reg
The cross-region share options for the data sets
in this group. This is derived from the first
byte of the DAASHROP element. Note that all the
data sets assigned to this report group have the
same cross-region share option listed under this
column.
Shr Opt Sys
The cross-system share options for the data sets
in this group. This is derived from the second
byte of the DAASHROP element. Note that all the
data sets assigned to this report group have the
same cross-system share option listed under this
column.
Avg Size (KB)
The average size, expressed in thousands of bytes
(kilobytes), of all data sets in this reporting
group. This is calculated by taking the total
amount of tracks allocated by all data sets in
this group, and dividing it by the number of data
sets. This value may be useful when trying to set
a default amount of space that could be assigned
to the data sets in this group.
Min Size (KB)
The smallest amount of space allocated, expressed
in thousands of bytes (kilobytes), detected for
all of the data sets in this reporting group. A
value of zero indicates that at least one data set
in the group is allocated with zero extents and
is, therefore, using no space for that data set.
This value may be useful when trying to set a
default amount of space that could be assigned to
the data sets in this group.
Max Size (KB)
The largest amount of space allocated, expressed
in thousands of bytes (kilobytes), detected for
all of the data sets in this reporting group.
This value may be useful when trying to set a
default amount of space that could be assigned to
the data sets in this group.
VSAM ATTRIBUTES (STGEFC) 1 CA MICS StorageMate - SUMMARY ABC CORPORATION Report # of % of VSAM C.I. LRECL Imbed Repli- Rel. Key % % Shr Shr Avg Min Max Group Data Data Org. Size cate Key Length Free Free Opt Opt Size Size Size Sets Sets Type Pos. C.I. C.A. Reg Sys (KB) (KB) (KB) 1 61 7.6 KS 512 0 N N 0 4 0 0 2 3 52 47 57 2 61 7.6 KS 4096 7290 N N 0 4 0 0 2 3 170 47 1709 3 39 4.9 ES 4096 0 0 0 0 0 3 4 1107 142 1700 4 36 4.5 KS 4096 0 N N 0 76 0 0 2 3 165 47 963 5 33 4.1 KS 1536 0 N N 0 23 0 0 2 3 4033 712 8500 6 32 4.0 KS 4096 0 N N 8 4 0 0 2 3 137 47 963 7 26 3.2 KS 512 0 N N 9 45 0 0 3 4 273 47 1133 8 20 2.5 KS 2048 0 N N 0 54 0 0 2 3 555 47 5553 9 18 2.2 KS 1024 0 N Y 9 45 0 0 3 4 660 47 1424
Figure 4-79. VSAM Attributes / Summary
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