18.2.266. PMIx_server_delete_process_set

PMIx_server_delete_process_set — Delete a PMIx process set name.

18.2.266.1. SYNOPSIS

#include <pmix_server.h>

pmix_status_t PMIx_server_delete_process_set(char *pset_name);

18.2.266.1.1. Python Syntax

from pmix import *

foo = PMIxServer()
# ... after a successful foo.init() ...
rc = foo.delete_process_set('myset')

18.2.266.2. INPUT PARAMETERS

pset_name: NULL-terminated string name of the process set being deleted.

18.2.266.3. DESCRIPTION

Provide a function by which the host environment can delete a process set name previously created with PMIx_server_define_process_set(3). Deleting the name has no impact on the member processes themselves — it simply removes the label and its associated membership record from the local PMIx server.

When called, the PMIx server library alerts all local clients to the deletion by generating a PMIX_PROCESS_SET_DELETE event carrying the PMIX_PSET_NAME attribute (the name of the deleted set), then removes the corresponding entry from its internal list of process sets. If no set with the given name is currently recorded, the notification is still issued and the call completes successfully.

PMIx_server_delete_process_set is a blocking call. Internally it thread-shifts the request onto the PMIx progress thread, emits the local notification, removes the recorded set, and returns once that processing is complete.

18.2.266.4. RETURN VALUE

Returns one of the following:

PMIX_SUCCESS — the deletion was processed and the local notification was issued.
PMIX_ERR_INIT — the PMIx server library has not been initialized.
PMIX_ERR_NOT_AVAILABLE — the library’s progress engine has been stopped, so the request cannot be serviced.

PMIx error constants are defined in pmix_common.h.

18.2.266.5. NOTES

This API is restricted to the server role and must be called only after a successful PMIx_server_init(3).

The host environment is responsible for ensuring consistent knowledge of process set membership across all involved PMIx servers. The PMIx library only removes the definition on the local server; it does not propagate the deletion to peer servers.