The SHOW-MASTER-CATALOG-ENTRY command (INFORMATION=*USER operand) can be used by the user to obtain information about the currently applicable and activated cache assignment (no cache or cache) for imported SF pubsets.
The SHOW-PUBSET-DEFINITION-FILE command provides information about the performance profile of volume sets of SM pubsets. In addition, the SHOW-PUBSET-FILE-SERVICES command enables the user to verify whether the pubset offers the services appropriate for the selected file attributes.
The use of hiperfiles is subject to the condition that systems support has granted the user the required authorization (DMS-TUNING-RESOURCES) and, for SM pubsets, that the user contingent (HIGH-PERF-SPACE or VERY-HIGH-PERF-SPACE) has been assigned a value greater than zero. Information on these settings is supplied by the SHOW-USER-ATTRIBUTES command.
The following caching authorizations can be assigned to the individual user by systems support:
NONE: the user does not receive any authorization to cache files.
CONCURRENT-USE: the user is authorized to cache files, but only in competition with all other users that have the same authorization. This means that if memory in the cache area is scarce, parts of the user file may be swapped to disk.
EXCLUSIVE-USE: the user is authorized to make exclusive use of a cache for file processing. In this case, even if memory is scarce, the system attempts to maintain the user's file entirely in the cache area at exactly the point when the user requests this by means of an appropriate file attribute.
The effects of these authorizations and the interaction between them and the user-specified file attributes are explained in the form of a table immediately after the next section "Selecting files".