SMF record 62 and SMF62MC1 byte meaning.

[Massimo Biancucci]

Hi all,

we started analyzing SMF62 to trace which A.S. use VSAM datasets and their
intent (Read or Update).

To do the task we analyze the SMF62MC1 flag (zOS 1.13).

So, a Cobol program does the following:

......
          SELECT ARCAPPU  ASSIGN TO                TITAR02U
                          ORGANIZATION IS INDEXED
                          ACCESS MODE  IS DYNAMIC
                          RECORD KEY   IS APP-KEY
                          FILE STATUS  IS STATUS-ARCAPPU.
......
          OPEN I-O    ARCAPPU.
......

Here the SMF62:

                     1         2         3         4         5
POSN        12345678901234567890123456789012345678901234567890

    1  CHAR ....=}....MVSAJTIMAN19...S....SYSPROD h...ICFUCAT.
       ZONE 13007D0102DEECDECDCDFF007E0102EEEDDDC48000CCCECCE4
       NUMR EE04E0143F4521139415190482143F2827964080009364313B
           +---------+---------+---------+---------+---------+
   51  CHAR APPLJP0                             SCATF1JTIP.VSB
       ZONE CDDDDDF44444444444444444444444444444ECCECFDECD4EEC
       NUMR 1773170000000000000000000000000000002313611397B522
           +---------+---------+---------+---------+---------+
  101  CHAR W0M.APPOGGIO.TITOLIXX               ..LRPRD3....PA
       ZONE EFD4CDDDCCCD4ECEDDCEE44444444444444400DDDDCF3320DC
       NUMR 604B17767796B3936397700000000000000001397943000F71
           +---------+---------+---------+---------+---------+
  151  CHAR XXBW01PAPRBW01UEFVS000..=.........
       ZONE EECEFFDCDDCEFFECCEEFFF007B0102*9*000
       NUMR 772601717926014565200004EF143F*A*000
           +---------+---------+---------+---------+---------+

So the SMF62MC1 is x'9A' = 1001 1010 in binary.

According to the manual:

1 = Record is identified by a KEY (it matches with Organization is indexed
from Cobol)
0 = RBA access NO
0 = CI access NO
1 = Sequential Processing (Access mode in Dynamic from Cobol)
1 = Direct Processing (Access mode in Dynamic from Cobol)
0 = Input Processing NO (???)
1 = Output Processing YES
0 = User Supplied Buffer Space NO

The program does all of READ, START, WRITE and REWRITE.

So, about the "Input Processing" flag,  I'm not able to pair the SMF record
with the behaviour (SMF64 states the read and update were done) of the
program.
In the past, if I well remember, I did some tests and at the I-O OPEN the
flags seemed to be OK.

What's wrong in my understanding ?

Thanks a lot for your support.
Massimo

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