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The very first thing you need to do is to find out where your space is
tied up.
First run, in batch, a RTVDSKINF.
Next, run a PRTDSKINF *SYS. Study that carefully. We have more free
space on our system than the pittance tied up in "User libraries". So,
trying to reorg a file to free up 10MB when the real culprit is an 800GB
IFS file (User directories) is not going to give you the biggest bang for
the buck. Don't you agree? You should get a report like the following on
our 5TB machine:
% of Size in
Description Disk 1,000,000 bytes
User libraries 11.96 565365.50
User directories 68.51 3239014.53
Folders and documents .02 715.66
QSYS .14 6409.20
Other IBM libraries .57 26880.27
Licensed Internal Code .09 4449.33
Temporary space .78 36995.31
Unused space 17.70 836812.74
System internal objects .16 7476.59
Objects not in a library .01 310.15
TOTAL 99.94 4724429.28
Further down on this report you will see it broken down into some system
detail. This will tell you things like "How much space is tied up in
spool files?" etc.
Now, if you DO have a lot of space tied up in User libraries (like more
"traditional" shops would have) then I suggest running PRTDSKINF *LIB.
That will give you a report like:
Library Information
% of Size in Last Last
Library Owner Disk 1000 bytes Change Use
YEAREND SSA 2.62 123806543.9 07/21/06 07/21/06
ROUTINES ROB 1.69 79773777.9 09/07/06 09/07/06
QGPL QSYS .72 34264125.4 09/07/06 09/07/06
QMPGDATA SYSGENPGMR .56 26699526.1 09/07/06 09/07/06
CLIDIVF SSA36 .39 18329284.6 09/07/06 09/07/06
MGR1499099 SYSGENPGMR .34 16162476.0 09/07/06 09/07/06
...
With an additional column on the right of:
Description
Year End Save Library
Common routines
General Purpose Library
Performance monitor data for PM/400
INTEGRAL Managers Data for GDI SERVICES PAYROLL
...
So, based on this information I can see that 2.62% of disk is tied up in
the library YEAREND. Therefore I would run:
PRTDSKINF RPTTYPE(*LIB) LIB(YEAREND) OBJ(*ALL) SORT(*SIZE)
This would give you this report:
Library/ % of Size in
Object Type Owner Library 1000 bytes
YEAREND *LIB SSA 123806642.2
DTIDIV0706 *FILE MONA 15.34 18993152.0
CLIDIV0706 *FILE MONA 14.77 18281984.0
CLIDIV1205 *FILE SSA36 11.51 14247288.8
DTIDIV1205 *FILE SSA70 11.02 13639376.9
PAIELC0706 *FILE MONA 9.03 11180998.7
PAIELC1205 *FILE SSA26 7.25 8970592.3
DEIDIV0706 *FILE MONA 5.63 6971023.4
DEIDIV1205 *FILE SSA23 5.23 6474448.9
...
What is doesn't tell you is the object type. I just happen to know they
are all save files. If I wanted to, I could break this down using DSPOBJD
to an outfile and query that for object type, etc. I could also do a
DSPFD to an outfile. Then I could query that. I could multiply the
number of deleted records by the record size to get an estimate of what
space would be freed by doing a RGZPFM. I could sort this computed
column, descending.
Now, if I wanted a list of the biggest traditional OS/400 objects (stuff
in libraries), regardless of library, I could run
PRTDSKINF RPTTYPE(*OBJ) OBJ(*ALL)
This would give you:
% of
Object Library Type Owner Disk
IFSLIST ROUTINES *FILE SSA .67
DTIDIV0706 YEAREND *FILE MONA .40
CLIDIV0706 YEAREND *FILE MONA .39
CLIDIV1205 YEAREND *FILE SSA36 .30
DTIDIV1205 YEAREND *FILE SSA70 .29
PAIELC0706 YEAREND *FILE MONA .24
Q249000035 QMPGDATA *MGTCOL QCOLSRV .22
ZAUDJR1057 QGPL *JRNRCV QDFTOWN .22
Q248000031 QMPGDATA *MGTCOL QCOLSRV .21
PAIELC1205 YEAREND *FILE SSA26 .19
ZAUDJR1055 QGPL *JRNRCV QDFTOWN .18
BACKFILE00 QGPL *FILE TROYM .18
DB00 PCBACKUP *FILE WATSON .17
DEIDIV0706 YEAREND *FILE MONA .15
DEIDIV1205 YEAREND *FILE SSA23 .14
ZAUDJR1059 QGPL *JRNRCV QDFTOWN .11
PRTRAND MGR1499099 *FILE SYSGENPGMR .10
...
Notice the first file in here that the average user would give a hoot
about is the last one I showed you - PRTRAND. The bulk is save files,
performance data, journal receivers and some stuff left over from an
ancient version of ADSM that I need to get rid of (thank you for the
exercise).
Now, getting back to the first report. Remember this line?
% of Size in
Description Disk 1,000,000 bytes
User directories 68.51 3239014.53
To break this down you need to run two other things:
RTVDIRINF DIR('/')
PRTDIRINF RPTTYPE(*DIR)
IBM needs to do some work on these reports. On most machines they run ok.
However on the machine with 68% tied up in IFS it takes over 30 hours
just to run the print. AFTER the rtv was already done! I ran it in debug
and you can see they really screwed the pooch with SQL. And this is after
a screaming fast upgrade that took a report that ran for over 2 hours on
this 570 down to 10 minutes. However, when it does get done you will have
a report like the following:
Size in
Description 1,000,000 bytes
Total disk space on system 4727853.02
Total disk used space 3869225.34
Total disk unused space 858627.67
___________________________________________________________________
Directory . . : /
Number of % of Size in
Description Objects Disk Megabytes
Total space used by this directory 327 .00 30.12
Total space used by objects in this directory and subdirectories 1205771
80.75 3641142.02
Total space used by storage freed files 0 .00
.00
Total space used by local files 243 .00 9.00
Total space used by hidden files 0 .00 .00
Total space used by stream files type 2 240 .00
8.24
Total space used by objects being journaled 0 .00
.00
Total space used by stream file with sever digital signatures 0 .00
.00
Total space used by files checked out 0 .00
.00
Skipping down several pages you can see that IXS cards and Linux
partitions really eat up the space:
_______________________________________________________________________________________________________________________________
Directory . . : /QFPNWSSTG
Number of % of Size in
Description Objects Disk Megabytes
Total space used by this directory 47 .00 .36
Total space used by objects in this directory and subdirectories 143
53.64 2418537.10
Total space used by storage freed files 0 .00
.00
Total space used by local files 1 .00 .03
Total space used by hidden files 0 .00 .00
Total space used by stream files type 2 0 .00
.00
Total space used by objects being journaled 0 .00
.00
Total space used by stream file with sever digital signatures 0 .00
.00
Total space used by files checked out 0 .00
.00
...
Versus the pittance used by
_______________________________________________________________________________________________________________________________
Directory . . : /QSYS.LIB
Number of % of Size in
Description Objects Disk Megabytes
Total space used by this directory 26929 .06 2849.59
Total space used by objects in this directory and subdirectories 1072284
12.50 564029.57
Total space used by storage freed files 0 .00
.00
Total space used by local files 23738 .05 2286.79
Total space used by hidden files 0 .00 .00
Total space used by stream files type 2 0 .00
.00
Total space used by objects being journaled 0 .00
.00
Total space used by stream file with sever digital signatures 12366 .03
1392.95
Total space used by files checked out 0 .00
.00
Rob Berendt
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