data sets managed by the storage management subsystem (SMS). Each log
stream, identified by its log stream name (LSN), is written to its own log data
sets.
3. Tertiary storage—a form of archive storage, used as specified in your
hierarchical storage manager (HSM) policy. Optionally, older records can be
migrated to tertiary storage, which can be either DASD data sets or tape
volumes.
Figure 71 and Figure 72 on page 711 show the types of storage used by the MVS
system logger.
MVS1
Current
Data Set
LSN1
LSN1
Staging
DataSets
Full
Data Set
Primary storage
Tertiary storage
DFHSM
Storage
Coupling
Facility
LSN
n
Log
Structures
LSN1
LSN2
Secondary storage
Data Space
System Logger
Figure 71. The types of storage used by the MVS system logger. This diagram shows a log stream that uses a
coupling facility. Primary storage consists of space in a structure within the CF, and either staging data sets or a data
space in the same MVS image as the system logger.
710 Customization Guide
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