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Source: VCADAA file at the DETAIL timespan
Function: This report helps to identify users or departments
that are wasting DASD storage space due to poor
allocation practices. These problems are caused
either by allocating more space than is necessary,
or by using an inefficient block size. The
Storage Administrator can analyze either or both
of these causes with the same report. Correction
of the problems detected by this report may
recover a large amount of storage space with a
small amount of effort.
Features: The middle portion of the report provides a
detailed analysis of the effectiveness of the
block size being used for each data set, including
the number of blocks that will fit on one track,
the percentage of each track that will be wasted,
plus a suggested better value. The right side of
the report shows waste due to overallocation of
space. The user can limit the number of data
sets, so that only the most wasteful data sets
will appear. The report can also be sorted by
space wasted or by data set name.
SMS
Issues: Users planning to use the system-determined block
size option may be able to simulate the effects of
more efficient block sizes, and thus help justify
SMS and DFP. As DASD space may be at a premium
during SMS implementation, this report could help
ensure that critical free space is not wasted by
poor allocations.
COLUMN DESCRIPTIONS
Data Set Name
The name of the data set. Depending on the values
coded on the report option screen, the sequence of
this report will be by Data Set Name or by the
Total MByte Waste column.
Volume Serial Number
The volume serial number of the storage medium.
Total MByte Waste
The total amount of DASD space being wasted by
this data set, expressed in millions of bytes
(megabytes). This includes the space wasted due
to poor block size (Block MByte Waste column),
plus the space wasted due to over-allocation of
space (Alloc MByte Waste column). Depending on
the values coded on the report option screen, the
sequence of this report will be by Data Set Name
or by the Total MByte Waste column.
Block Size
The maximum length of a physical block written
into this data set.
LRECL
The maximum length of each logical record in this
data set.
RECFM
Specifies the characteristics of the records in
the data set. The records can be fixed length
(F), variable length (V), or undefined length (U).
Blocks Per Track
The number of blocks of this data set that will
fit on one DASD track. Multiplying this number by
the Block Size will result in a determination of
the number of bytes actually used on each track,
and serves as the basis for determining waste due
to poor Block Size. If this value is zero, the
Blocks Per Track could not be calculated either
because of a zero Block Size, or because the
TRKCALC service ended in error. If the Block Size
is not zero, examine the MICSLOG for any error
messages related to TRKCALC.
% Each Track Unused
Based on the current Block Size, the percentage of
each DASD track that is not being used. The
larger this value, the more space that is being
wasted. If this value is 100%, the value could
not be calculated either because of a zero Block
Size, or because the TRKCALC service ended in
error. If the Block Size is not zero, examine the
MICSLOG for any error messages related to TRKCALC.
Sugg. Block Size
A suggested Block Size for this data set that
would cause more efficient use of each track. If
this value is blank, the suggested size is either
already being used, or it could not be calculated
due to the characteristics of the data set.
Block MByte Waste
The Non-VSAM Wasted Space report identifies wasted
space caused by poor block sizes, overallocation
of space, or both. If only waste by
overallocation was requested, this column will
contain zeros.
Tracks Alloc
The number of tracks allocated to this data set on
the current volume.
Tracks Used
The number of tracks actually used by this data
set on the current volume.
Alloc MByte Waste
The Non-VSAM Wasted Space report identifies wasted
space caused by poor block sizes, overallocation
of space, or both. If only waste by poor block
size was requested, this column will contain
zeros.
NON-VSAM WASTED SPACE (STGECC) 1 CA MICS StorageMate - DETAIL ABC CORPORATION ----------------------------------------------------------- SYSID=SYS7 ------------------------------------------------------------ Data Set Name Volume Total | Block LRECL RECFM Blocks Sugg. % Each Block | Tracks Tracks Alloc Serial MByte | Size Per Block Track MByte | Alloc Used MByte Number Waste | Track Size Unused Waste | Waste SYS7.HASPACE SPOOL1 620 | 0 0 V 0 23476 100 0 | 13200 0 620 MVSRGS.IPL4BB.D900413 SYS080 290 | 0 0 U 0 100 289 | 6165 6152 1 MVSEGP.AKD000.STAN PAG406 188 | 0 0 U 0 100 188 | 4005 3998 0 ITS035.SNA.MICS.DETAIL ITS003 141 | 32760 32756 U 1 31 36 | 4800 2569 105 QCAM.ABC9004U.DETAIL SPAR01 140 | 32760 32756 U 1 31 0 | 3000 10 140 AKD000.FUT8910.TEST.LIST SPAR04 117 | 6160 80 FB 7 23440 9 0 | 2500 0 117 AKD052.MAMICSUP.DETAIL LNR934 114 | 32760 32756 U 1 31 66 | 5700 4668 48 QCAM.TMP9004D.DETAIL SPAR05 112 | 32760 32756 U 1 31 15 | 3130 1062 97 SYS7.TARGTMC PAG405 111 | 200 200 FB 68 23400 72 76 | 3000 2264 35 SYS7.TMC MCAT04 107 | 200 200 F 68 23400 72 83 | 3000 2485 24 QCAM.ALL.DOC.TEXT SPAR02 42 | 6160 137 VB 7 23476 9 0 | 900 14 42 OPRSEH.SMF.DETAIL LNR927 41 | 32760 32756 U 1 31 0 | 900 23 41 AKD052.MAMICSUP.WEEKS LNR921 41 | 32760 32756 U 1 31 23 | 1983 1596 18 ONLSMS.P8910IMS.WEEKS LNR928 40 | 32760 32756 U 1 31 0 | 850 2 40 CAPMGG.DETAIL LNR804 39 | 32760 32756 U 1 31 10 | 1350 739 29 PASSRB.PAS4.INT.BACKUP.DATABASE DAT002 39 | 32760 32756 U 1 31 25 | 2055 1755 14 AKD052.MAMICSUP.MONTHS LNR919 39 | 32760 32756 U 1 31 38 | 2700 2680 1 AKD182.SAMSES.SPACE SPAR01 106 | 6160 80 FB 7 23440 9 0 | 2250 0 106 QCAM.NAS9004U.DETAIL LNR918 105 | 32760 32756 U 1 31 3 | 2400 223 102 SYS7.DUMP01 SMF411 95 | 4104 4104 F 10 20520 13 0 | 2025 0 95 SYS7.DUMP02 SMF411 95 | 4104 4104 F 10 20520 13 0 | 2025 0 95 SYS7.DUMP03 SMF411 95 | 4104 4104 F 10 20520 13 0 | 2025 0 95 ONLSSE.IMS.DLOG.V310.FEDX.S0C4@OC SPAR02 90 | 32760 32756 VB 1 31 90 | 6345 6345 0 PASSRH.PAS4.OLD.INFO.HISTORY DAT001 78 | 32760 32756 U 1 31 45 | 3900 3201 33 OPRSES.SRL.DETAIL LNR922 77 | 32760 32756 U 1 31 0 | 1650 3 77 CSH.PRODUCTS.SASDB LNR801 77 | 32760 32756 U 1 31 36 | 3375 2505 41 QCAM.USA9004D.DETAIL SPAR03 70 | 32760 32756 U 1 31 2 | 1600 147 68 AKD052.MAMICSUP.DAYS2 LNR806 67 | 32760 32756 U 1 31 2 | 1500 106 65 AKD052.MAMICSUA.DETAIL LNR919 65 | 32760 32756 U 1 31 28 | 2750 1953 37 AKD052.MAMICSUP.DAYS LNR933 63 | 32760 32756 U 1 31 53 | 3930 3722 10 QCAM.INT9004F.DETAIL LNR934 61 | 32760 32756 U 1 31 4 | 1500 277 57 ONLSSE.P8910IMS.DETAIL LNR922 61 | 32760 32756 U 1 31 0 | 1300 2 61 MSSRRP.CP.DETAIL EIS001 60 | 32760 32756 U 1 31 21 | 2325 1500 39 SYS7.LINKLIB SP4OL1 59 | 32760 0 U 1 31 10 | 1755 721 49 QCAM.STST8910D.DETAIL SPAR03 58 | 32760 32756 U 1 31 5 | 1500 367 53 ------------------------------------------ ------- ------- ------ ------ ------ SYSID 5582 1619 173990 89525 3963 ======= ======= ====== ====== ====== 5582 1619 173990 89525 3963
Figure 4-55. Non-VSAM Wasted Space / Detail
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