








	*SMF Tools*

SMF Type 7 Record

This table shows the record layout for type 7 SMF records
(Data Lost).

List of other SMF record layouts available.
List of sample SMF reports.

Purpose: If all SMF buffers become full (either a result of no available output data sets for SMF to write to OR the system generating records at a rate faster than SMF can physically write them), SMF data will be lost. When this condition occurs, record type 7 tracks the number of lost records. It contains a count of the SMF records that were not written and the start and end times of the period when data was lost. (The end time is the time recorded in SMF7TME at offset 6).

Record type 7 is not built until SMF buffers become available again. Data existing in the SMF buffer, prior to data lost, is written to available SMF data sets before record type 7 is written to a data set.

It's easy to report on SMF 7 data!

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SMF Type 7 Record -- Data Lost
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF7LEN	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” on page 13-1 for a detailed description.
2	2	SMF7SEG	2	binary	Segment descriptor (see record length field).
4	4	SMF7FLG	1	binary	System indicator: Bit Meaning When Set 0-2 Reserved 3-6 Version indicators* 7 Reserved.*See “Standard SMF Record Header” on page 13-1 for a detailed description.
5	5	SMF7RTY	1	binary	Record type 7 (X'07').
6	6	SMF7TME	4	binary	Time since midnight, in hundredths of a second, when the record was built into the SMF buffer.
10	A	SMF7DTE	4	packed	Date when the record was moved into the SMF buffer, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
14	E	SMF7SID	4	EBCDIC	System identification (from the SID parameter).
18	12	SMF7NRO	2	binary	Number of SMF records lost because no SMF data sets were available for recording. Unsigned, count up to 65,535. This field is marked as invalid, and is set to zero when SMF7NRF is ON. SMF7NROX is the 4 byte equivalent of this field.
20	14	SMF7STM	4	binary	When SMF7DRP is off, this is the time when the buffers condition began. When SMF7DRP is on, this is the time when the DROP record filter became active. This field is in hundredths of a second.
24	18	SMF7STD	4	packed	When SMF7DRP is off, this is the date when the buffers condition began. When SMF7DRP is on, this is the date when the DROP record filter became active. This field is in packed decimal format: 00yydddF.
28	1C	SMF7FL1	1	binary	Flag byte: Bit - Meaning when set 0 - Bit SMF7NRF indicates that field SMF7NRO has exceeded its 2 byte capacity and is therefore invalid. Use SMF7NROX, which is the 4 byte equivalent of SMF7NRO. 1 - Bit SMF7LSD indicates that this record is the result of a log stream becoming full. 2 - Bit SMF7DRP indicates that this record is the result of the SMF record flood facility dropping records. 3- 7 - Reserved.
29	1D	SMF7RSV1	2	--	Reserved.
31	1F	SMF7DTYP	1	character	The type of record that was dropped by the filter. This field is zero unless SMF7DRP is ON.
32	20	SMF7NROX	4	binary	Number of SMF records lost because no SMF data sets were available for recording. Unsigned, 4 byte equivalent of SMF7NRO.
36	24	SMF7LSN	26	character	The name of the log stream associated with the data space that experiences the loss. Only filled in when SMF7LSD is ON.
62	3E	SMF7TBLS	8	binary	The number of bytes lost during SMF initialization. This field will be non-zero if the SMF temporary buffer is exhausted and, therefore, records are lost during SMF initialization.

The table above is based on the description provided by IBM in its "MVS Systems Management Facilities (SMF)" manual.

Spectrum SMF Writer - the 4GL SMF Report Writer.

SMF Type 7 Record

This table shows the record layout for type 7 SMF records (Data Lost).

It's easy to report on SMF 7 data!

This table shows the record layout for type 7 SMF records
(Data Lost).