This section describes the definition of system and general log streams under the following headings:
All CICS® system logging and journaling is controlled by the CICS log manager, which uses MVS™ system logger log streams to store its output.
CICS logging and journaling can be divided into four broad types of activity:
CICS also supports programming interfaces that enable you to write your own data to the system log, but user-written records should be for recovery purposes only.
Forward recovery logging is not automatic--you must specify that you want this facility for your files, and also define the forward recovery log streams.
Autojournaling is not automatic--you must specify that you want this facility for your files and terminal messages, and also define the general log streams to be used.
See the JOURNAL attribute under file definition attributes and profile definition attributes for information about specifying automatic journaling on FILE and PROFILE resource definitions.
See the CICS System Definition Guide for information about defining general log streams for user journals.
Autojournaling and user journals play no part in CICS recovery and therefore are not discussed here.
The CICS log manager writes the data associated with these logging and journaling activities to two types of MVS log stream:
For information on how CICS handles the different error conditions detected by the CICS log manager, see the CICS Problem Determination Guide.
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