Statistics Records Content

The statistics records include the following information:
  • In all records:
    • Record type or function
    • Date and Time of record logging
    • Process name and number
    • SMFID
    • User ID
    • Other node (secondary or primary) involved in the Process
    • Start and stop time of the function
    • Highest or final completion code and message
    • Step label name, if one is specified
  • In the Member Copy record, the input and output member names
  • In the Process Submit and Submit Within records, the submitted PDS DSN and member name
  • In the Copy record:
    • The number of records or blocks read from or written to the file, and whether the transfer was performed in block or record mode
      Connect:Direct® for z/OS® transfers files in block mode when allowed, after checking multiple conditions. First, both the source and destination must either be using the MVS file system (not sysout, USS, etc), or simulate it in the FMH71 exchange (Connect:Direct for i5/OS and IBM Connect:Direct for UNIX can do this – see 2 below). Next, for both the source and destination files, the DSORG must be PS, and the RECFM and BLKSIZE must be the same (also, if the RECFM is blocked, then the LRECL must be the same). IBM Connect:Direct for z/OS transfers files in record mode when block mode is not allowed. A record mode transfer will result in re-blocking when the source and destination files have a blocked RECFM and either the LRECL or BLKSIZE is different. The mode of transfer can be ascertained by comparing the number of blocks and records read during the transfer.
      1. Transferring from IBM Connect:Direct for z/OS to IBM Connect:Direct for z/OS: A non-zero record count would imply that a record mode of transfer is used.
      2. Transferring from IBM Connect:Direct for z/OS to other platforms: Generally, during inter-platform transfers, due to difference in, or absence of, MVS file system DCB parameters on the other platform, transfer takes place in record mode. IBM Connect:Direct for UNIX and Connect:Direct for i5/OS can represent its file as being in an MVS file system by duplicating the IBM Connect:Direct for z/OS file’s DCB parameters in the FMH71, and so cause the transfer takes place in block mode. In those cases, IBM Connect:Direct for z/OS will read and send entire blocks (so the record count will be zero at the IBM Connect:Direct for z/OS end), and IBM Connect:Direct for UNIX/Connect:Direct for i5/OS will deblock the data and write records, and so will report a non-zero record count at their end. The reverse is also true – IBM Connect:Direct for UNIX and Connect:Direct for i5/OS when sending to IBM Connect:Direct for z/OS, can block its records and send blocks to IBM Connect:Direct for z/OS. IBM Connect:Direct for z/OS receiver writes the blocks without deblocking the data and so once again the record count will be zero at the IBM Connect:Direct for z/OS end.
    • The number of I/O bytes that were read or written from disk or tape
    • The number of VTAM bytes sent or received during the session, including IBM Connect:Direct and VTAM control information
    • The RUSIZE

      The size displayed is not the actual RUSIZE used by the transfer but rather the RUSIZE indicated by the LOGMODE. VTAM can negotiate for a smaller RUSIZE.

    • The compression percentage

      This percentage is calculated by evaluating the number of VTAM bytes and the number of I/O bytes. If the number of VTAM bytes is less than or equal to the number of I/O bytes, a positive compression percentage is calculated as:

      Compression Percentage = (1 – {VTAM Bytes ³ I/O Bytes} ) x 100

      If the number of VTAM bytes is greater than the number of I/O bytes, a negative compression is calculated as:

      Compression Percentage = – (1 – {I/O Bytes ÷ VTAM Bytes} )x 100

      The compression percentage values displayed in the Copy Termination record differ depending on the file attributes specified. A negative compression percentage means that more bytes are sent than are read from the file. This includes IBM Connect:Direct control information.