Daily SMF files are typically GDGs, one generation created by each SMF dump (IFASMFDP) job. They can only be defined by the Take-up from SMF File facility.
A daily SMF file remains available for reporting until you uncatalog or delete its data set. When a daily SMF data set is uncataloged or deleted, CICS PA marks its SMF file definition as "expired" (no longer available for reporting). To delete expired daily SMF file definitions, run the HDB housekeeping utility.
You cannot report on a mix of cyclic SMF files with and without origins. If a system contains definitions for cyclic SMF files with and without origins, then you must either exclude the files with no origin, or exclude all of the others.
You specify one or more cyclic SMF file definitions that match the way you collect and manage long-term SMF data at your installation.
IFASMF.FTS1.SMF.MAN1
There are two types of log stream: Coupling Facility (CF) and DASD-only. CF log streams are available to all images in the plex and do not require any special processing. DASD-only log streams are created by and can only be accessed by their local MVS Image. DASD-only log streams require the CICS PA job to be run on their local system and therefore require special handling.
It is possible to route different SMF records to separate log streams, so that for example one log stream contains CMF records, while another contains DB2 records, and yet another contains WebSphere® MQ records. Since some CICS PA reports combine records from different data sources, CICS PA supports multiple log streams as input into reports.
Log streams have almost unlimited capacity. Therefore, when processing log streams in CICS PA, specification of the reporting time range is mandatory.
The DASDONLY profile option (menu option 0.5) determines the log stream type for all log streams in all system definitions. If selected, this option indicates that all log streams will be treated as DASD-only and will require an Image name to execute. If DASDONLY is not selected, all log streams are treated as CF log streams.
SMF log streams have a retention period specified in days (0-65536). Records older than the retention period are considered inactive but might not be deleted immediately. Inactive records that are still stored in the log stream are available for reporting through CICS PA.
When Shared System Definitions are used, all batch requests (that require SMF input) will have their SMF file DD statements generated automatically from either the Daily SMF File or Cyclic SMF File or log stream definitions. Specify the required reporting interval, and CICS PA will automatically select the required SMF files for your job.
If reporting is required for today, then CICS PA will use the Daily SMF Files (if available). Otherwise, CICS PA will use the Cyclic SMF File definitions to satisfy your request. If no SMF file definitions cover the required reporting interval, then CICS PA will honor the “Missing SMF Files Option” on the run panel.
A
log stream is only selected if the report interval Start time falls
within the span of the log stream and the "Use Log Streams when
available" profile option is selected. Otherwise, normal file selection
is performed. The log stream retention period (RETPD) in the System
Definition is used to determine the start time of the first record
in the log stream.
To avoid double
accounting of SMF data, JCL generation prevents the use of a log stream
with SMF files. However, you can define a log stream and SMF files
in the same System Definition and either the log stream or files will
be selected based on the specified report interval.