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------------------- Compression Candidacy Report -------------------- Unit Database ID ===> _ Analyze: Detail timespan ===> Y (Y/N) Days timespan ===> Y (Y/N) Weeks timespan ===> Y (Y/N) Months timespan ===> Y (Y/N) Years timespan ===> Y (Y/N) Limit report to: Products ===> ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ Information areas ===> ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ Files ===> ______ ______ ______ ______ ______
. . . . . . . . . . . . . . . . . . . . . . . . . .
The candidacy report analyzes each CA MICS Database unit and
reports the unit's compression status, current space
allocation, and estimated DASD space savings.
To produce the Compression Candidacy Report, choose option 1
from the CA MICS Administrator Utilities menu (MWF;5;4;1).
The following panel is displayed.
Fill in values, as described below, and press END or use the
PF3 key to submit the inquiry.
Unit Database ID the one-character identifier assigned
to the unit on which you want to
report. A list of valid values for
your site is available by placing
a question mark (?) in the field.
Analyze: Y (Yes) or N (No). Defaults to Y.
Detail timespan These fields enable you to control
Days timespan the extent to which you want to
Weeks timespan report on the effects of implementing
Months timespan compression. For example, if you are
Years timespan not interested in compressing Years
timespan data, set its Analyze value
to N.
Limit report to: three-character product identifiers,
Products three-character information area
Information areas identifiers, or six-character file
Files identifiers. These fields enable you
to restrict the report to specific
products, information areas, or
files.
Note: If you use choose to limit the
report, information about the
products, information areas, and
files that are not selected are
accounted for in the "Overhead space"
category.
For example, if your site heavily
uses the CICS Analyzer and you want
to implement compression in phases,
you might choose to implement
compression first for the CICS
Analyzer. Specify CIC in the
Products field to report on the
effects of implementing compression
on this product's files.
A portion of the DETAIL timespan section of the report,
which is run in batch mode on the first cycle of data in the
unit, follows.
Compression Candidacy Report ---------------------------- CA MICS complex name: MDI.DIA6100-COMPRESSION COMPLEX Timespan: DETAIL Libref: PDETAIL Date: 26APR00 Page 1 Percent savings limit specified: 0.00 % Total uncompressed file space: 1377.1679 ----------+-----+------+------+-----+-------------------+---------------------------+ | | % of | % of |---ESTIMATE all cycles---|--ACTUAL values 1st cycle--| CCC File |Match| Total| Total|Cycle| uncmprss| cmprss | uncmprss| cmprss |cmprss | |Limit| Saved| Space|Count|(M/bytes)|(M/bytes)|(M/bytes)|(M/bytes)|percent| ----------+-----+------+------+-----+---------+---------+---------+---------+-------+ ACT ACTJBJ NOTSUP 0.00 0.01 2 0.1055 0.1055 0.0264 0.0264 0.00 ACT ACTJBP NOTSUP 0.00 0.70 2 9.6240 9.6240 4.0342 4.0342 0.00 ACT ACTJBS NOTSUP 0.00 0.02 2 0.2637 0.2637 0.0264 0.0264 0.00 ACT ACTJDA NOTSUP 0.00 3.46 2 47.6191 47.6191 23.8623 23.8623 0.00 ------------------------------------------------------------------------------------- ACT 4 0 0.00 4.18 8 57.6123 57.6123 27.9492 27.9492 0.00 ... information omitted ... ------------------------------------------------------------------------------------- SMF BAT_JS NEVER 0.00 0.12 1 1.6875 1.6875 1.6875 1.6875 0.00 SMF BAT_ST YES 7.59 12.83 10 176.7233 72.1934 24.7852 10.1250 59.15 SMF BAT_TP YES 0.00 0.04 10 0.5273 0.5273 0.0527 0.0527 0.00 SMF BAT_TS YES 1.67 3.81 10 52.5000 29.5313 0.8438 0.4746 43.75 SMF BATATP YES 0.00 0.02 10 0.2637 0.2637 0.0264 0.0264 0.00 SMF BATJOB YES 1.27 2.61 10 35.8887 18.4570 1.8457 0.9492 48.57 SMF BATPGM YES 6.55 12.78 10 175.9976 85.7988 4.2188 2.0566 51.25 SMF BATSFA NEVER 0.00 0.00 1 0.0264 0.0264 0.0264 0.0264 0.00 SMF BATSFH NEVER 0.00 0.00 1 0.0264 0.0264 0.0264 0.0264 0.00 SMF BATSFI NEVER 0.00 0.04 1 0.5273 0.5273 0.5273 0.5273 0.00 SMF BATSFJ NEVER 0.00 0.04 1 0.5537 0.5537 0.5537 0.5537 0.00 SMF BATSFP NEVER 0.00 0.01 1 0.1582 0.1582 0.1582 0.1582 0.00 SMF BATSFS NEVER 0.00 1.34 1 18.4043 18.4043 18.4043 18.4043 0.00 SMF BATSFW NEVER 0.00 0.03 1 0.4482 0.4482 0.4482 0.4482 0.00 SMF BATSF4 NEVER 0.00 0.00 1 0.0264 0.0264 0.0264 0.0264 0.00 SMF BATSPL YES 0.00 0.27 10 3.6914 3.6914 0.0264 0.0264 0.00 SMF OPSAVL YES 0.02 0.03 1 0.4219 0.1318 0.4219 0.1318 68.75 SMF OPSCON YES 0.03 0.20 1 2.8213 2.4521 2.8213 2.4521 13.08 SMF OPSOPI YES 0.05 0.08 1 1.1074 0.4746 1.1074 0.4746 57.14 ------------------------------------------------------------------------------------- SMF 19 0 17.17 34.26 82 471.8010 235.3799 58.0078 38.6279 33.41 ... information omitted ... ------------------------------------------------------------------------------------- PDETAIL 96 0 36.31 100.00 383 1377.1679 877.1845 435.8760 316.0371 27.49 =====================================================================================
Compression Candidacy Report ---------------------------- CA MICS complex name: MDI.DIA6100-COMPRESSION COMPLEX Timespan: DETAIL Libref: PDETAIL Date: 26APR00 Page 5 Percent savings limit specified: 0.00 % Total uncompressed file space: 1377.1679 All space values are in M/bytes. ===========================Allocation Summary=========================== |Current Library: | | | | Dataset name: MDI.DIA6100P.DETAIL | | | | Total space allocated | 1548.7559 | 1548.7559 | (Current Allocation) | Uncompressed file space | 406.5820 | | | | Compressed file space |+ 524.7334 | | | | Overhead space |+ 3.9551 | | | | |------------| | | | Minimum space used |= 935.2705 |- 935.2705 | | | ============|------------| | | Free space in library |= 613.4854 | | | Highest used space |- 53.0508 | | | |------------| | | Allocated space never used (future use) |= 560.4346 | | ========================================================================
Compression Candidacy Report ---------------------------- CA MICS complex name: MDI.DIA6100-COMPRESSION COMPLEX Timespan: DETAIL Libref: PDETAIL Date: 26APR00 Page 6 Percent savings limit specified: 0.00 % Total uncompressed file space: 1377.1679 +--------+-------+-----------+--------+ |Percent | Total | Est. DASD | Est. | |Savings | File | Savings | Percent| | Limit | Count | (M/bytes) | Savings| |--------+-------+-----------+--------| | 7.50 | 1 | 104.5300 | 7.59 %| | 6.50 | 2 | 194.7287 | 14.14 %| | 6.00 | 3 | 278.1201 | 20.20 %| | 2.30 | 4 | 311.0577 | 22.59 %| | 1.90 | 5 | 337.8802 | 24.53 %| | 1.80 | 6 | 363.1927 | 26.37 %| | 1.70 | 7 | 387.2697 | 28.12 %| | 1.60 | 9 | 432.8268 | 31.43 %| | 1.20 | 10 | 450.2584 | 32.69 %| | 0.60 | 11 | 459.4131 | 33.36 %| | 0.50 | 12 | 467.4873 | 33.95 %| | 0.20 | 17 | 484.2451 | 35.16 %| | 0.10 | 20 | 489.5968 | 35.55 %| | 0.00 | 96 | 499.9834 | 36.31 %| +--------+-------+-----------+--------+
The sample report shows the amount of space used by each
product's files in the DETAIL timespan. You can use it to
determine whether or not implementing compression for a given
product in a given timespan will enable you to achieve the
space savings you desire.
Run this report using a typical day's input data (probably
not a holiday or weekend day) because the report uses data
from the first cycle it finds.
The report is divided into sections, one for each timespan
on which you chose to report. In each timespan section,
information is presented by product, with specifics shown for
each file. An allocation summary section is provided for
each timespan.
The header information in each section is:
CA MICS the name of the CA MICS complex from which
complex name the report is run.
Timespan the timespan being reported.
Libref the name of the library that contains the
data.
Date the date on which the report was run.
Percent this field contains 0.00% to ensure that all
savings files are evaluated as candidates for
limit compression.
specified
Total the estimated amount of space, measured in
uncompressed megabytes, that would be consumed if all file
file space cycles were uncompressed.
The fields in each timespan section are:
CCC the three-character product identifier.
File the six-character file identifier.
Match Limit YES, NOTSUP, NEVER, or blank. YES means that
the file should be compressed because it
matches the savings limit. NOTSUP means that
the file does not support compression. NEVER
means that the file must not be compressed.
Blank means that the file should not be
compressed because it does not match the
savings limit.
% of Total the amount of space saved by compressing this
Saved file in this timespan, expressed as a
percent of this timespan's total space used
by all uncompressed files.
% of Total the amount of space consumed by the
Space uncompressed file in this timespan,
expressed as a percent of this timespan's
total space used by all uncompressed files.
ESTIMATE all cycles
Cycle Count the estimated number of cycles of this file
in this timespan.
uncmprss the estimated number of megabytes of space
(M/bytes) that would be occupied by all cycle files in
this timespan if all cycles of the file were
not compressed.
cmprss the estimated number of megabytes of space
(M/bytes) that would be occupied by all cycle files in
this timespan if all cycles of the file were
compressed.
ACTUAL values 1st cycle
uncmprss the actual number of megabytes of space that
(M/bytes) would be occupied by the file in this
timespan if the file was not compressed.
cmprss the actual number of megabytes of space that
(M/bytes) would be occupied by the file in this
timespan if the file was compressed.
cmprss the difference between the compressed and
percent uncompressed sizes. A negative value means
that the compressed file is larger than the
uncompressed file.
In addition to the header information, the fields in each
allocation summary section are:
Current Library
Dataset the name of the data set on which you are
name reporting.
Total space the actual amount of space currently
allocated allocated for this data set.
Uncompressed the actual amount of space used by files that
file space are currently uncompressed.
Compressed the actual amount of space used by files that
file space are currently compressed.
Overhead the amount of space used by products,
space information areas, or files not selected and
overhead for directories and the like.
Minimum the amount of space used by compressed files,
space used uncompressed files, and overhead.
Free space the difference between the current allocation
in library and the minimum space used.
Highest used the largest amount of space used in the
space library. (This is space that was used and
then freed.)
Allocated the difference between the amount of free
space never space in the library and the largest amount
used of space used in the library.
(future use)
The summary section also presents a table that you can use to
help choose the maximum amount of compression you seek to
achieve. The columns in the table are:
Percent the timespan savings percentage. A value of
Savings 0 means that all files eligible for
Limit compression would be compressed, even if
those files would produce 0% savings in the
timespan. A value of of 1.70 means that
only files that save 1.7% or more of the
space used by the timespan would be
compressed. A value of **** means that the
files' sizes increase when they are
compressed (negative compression).
Total File the number of files that meet or exceed the
Count percent savings limit value.
Est. DASD the estimated amount of DASD space that is
Savings saved by compressing the files that meet the
(M/bytes) percent savings limit value.
Est. Percent the estimated percentage of DASD space that
Savings is saved by compressing the files that meet
the percent savings limit value. (The
percentage is calculated using the
uncompressed size of the library.)
Using the sample report's table, if the System Administrator
were to set the site's compression limit at 0.10, 20 files
would be eligible for compression. To find out which files,
browse the "% of Total Saved" column in timespan section of
the report and note the files whose values are 0.10 or
greater. By compressing those 20 files, the site would save
an estimated 35% of its current DASD space allocation for the
DETAIL timespan.
If the site chose 0% as its objective, it would need to
compress an additional 76 files, but would achieve only 0.7%
additional DASD space savings.
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