The following HSMS statements are available for request management:
DELETE-REQUESTS: delete requests from the request file
RECOVER-REQUESTS: recover requests in the SM environment
RESTART-REQUESTS: restart interrupted requests
SHOW-REQUESTS: output requests to the request file
The management functions for SF and SM environments are the same. There are additional functions for SM environments for restart and recovery of requests. The management functions are described below.
Requests for SF environments are managed exclusively in the global HSMS request file by the host on which the home pubset is running.
For requests relating to SF pubsets only, the request management is purely local for the host. For requests issued to a shared SF pubset, the request management is more complex: requests issued to a slave sharer are usually sent to the master sharer for processing. For more detailed information, see section "Request management for shared pubsets".
Requests for SM pubsets are managed in the SM pubset-specific request file. As a closed container, an SM pubset can be transported from host to host and shared between several hosts. This is why the request file of an SM pubset has its own request inhibit mechanism which guarantees request coherence while the host or the configuration is being changed.
The two rules below always apply to SM pubset requests:
A request that is already being processed, is linked by the inhibit mechanism to the host that is processing the request. A request of this type cannot be changed, started or deleted by another host.
A request that has not yet been processed is not linked to any host. A request of this type can be accessed by any host or sharer that has imported the pubset.
The effects that shared pubsets have on request management are described in section "Request management for shared pubsets".
Problems that arise from a host or configuration change are described in section "Recovery of requests after a host crash".
The compatibility of HSMS definitions in a heterogeneous version environment is described on "Compatibility of HSMS definitions in different HSMS environments".