Header/Self-defining Section

This section contains the common SMF record headers fields and the triplet fields (offset/length/number), if applicable, that locate the other sections on the record.

Offsets Name Length Format Description
0 0 SMF41LEN 2 binary Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word). See Standard SMF record header for a detailed description.
2 2 SMF41SEG 2 binary Segment descriptor (see record length field).
4 4 SMF41FLG 1 binary System indicator:
Bit
Meaning when set
0
Subsystem identification follows system identification
1
Subtypes used
2
Reserved
3-6
Version indicators*
7
Reserved.

*See Standard SMF record header for a detailed description.
5 5 SMF41RTY 1 binary Record type 41 (X'29').
6 6 SMF41TME 4 binary Time since midnight, in hundredths of a second, when the record was written.
10 A SMF41DTE 4 packed Date when the record was moved into the SMF buffer, in the form 0cyydddF. See Standard SMF record header for a detailed description.
14 E SMF41SID 4 EBCDIC System identification (from the SID parameter).
18 12 SMF41SSI 4 EBCDIC Subsystem identification (EBCDIC blanks).
22 16 SMF41STY 2 binary Record subtype
Value
Meaning
1
ACCESS
2
UNACCESS
3
VLF statistics.
24 18 SMF41TRP 2 binary Number of triplets. A triplet is a set of offset/length/number values that defines a section of the record.
26 1A SMF41xxx 2   Reserved.
28 1C SMF41OPD 4 binary Offset to product section.
32 20 SMF41LPD 2 binary Length of product section.
34 22 SMF41NPD 2 binary Number of product sections.
36 24 SMF41OD1 4 binary Offset of object ACCESS data section.
40 28 SMF41LD1 2 binary Length of object ACCESS data section.
42 2A SMF41ND1 2 binary Number of object ACCESS data sections.
44 2C SMF41OD2 4 binary Offset of object UNACCESS data section.
48 30 SMF41LD2 2 binary Length of object UNACCESS data section.
50 32 SMF41ND2 2 binary Number of object UNACCESS data sections.
52 34 SMF41OD3 4 binary Offset of I/O activity section.
56 38 SMF41LD3 2 binary Length of I/O activity section.
58 3A SMF41ND3 2 binary Number of I/O activity sections.
60 3C SMF41OD4 4 binary Offset to the VLF statistics section.
64 40 SMF41LD4 2 binary Length of the VLF statistics section.
66 42 SMF41ND4 2 binary Number of VLF statistics sections.
Parent topic: Record Mapping