DPM: Force 'hash' GDS component when singleton spawn

* See openpmix/openpmix#2705 Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
MamziB · Oct 26, 2022 · 35d696d · 35d696d
1 parent 113ae31
commit 35d696d
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/ompi/dpm/dpm.c b/ompi/dpm/dpm.c
@@ -1611,6 +1611,11 @@ int ompi_dpm_spawn(int count, const char *array_of_commands[],
     OPAL_LIST_DESTRUCT(&job_info);
 
     if (ompi_singleton) {
+        /* The GDS 'hash' component is known to work for singleton, so
+         * recommend it. The user may set this envar to override the setting.
+         */
+        setenv("PMIX_MCA_gds", "hash", 0);
+        /* Start the DVM */
         rc = start_dvm(hostfiles, dash_host);
         if (OPAL_SUCCESS != rc) {
             if (NULL != pinfo) {