IBM SC33-1683-02 - Manual (Page 662)

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 53 and Figure 54 on page 631 show the types of storage used by the MVS
system logger.
MVS1
Current
Data Set
LSN1
LSN1
Staging
Data Sets
Full
Data Set
Primary storage
Tertiary storage
DFHSM
Storage
Coupling
Facility
LSN n
Log
Structures
LSN1
LSN2
Secondary storage
Data Space System Logger
Figure 53. 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.
journaling
630 CICS TS for OS/390: CICS Customization Guide