diff --git a/lib/nova_plugins/hypervisor-ironic b/lib/nova_plugins/hypervisor-ironic
index d59473ca1c..062afb7f7c 100644
--- a/lib/nova_plugins/hypervisor-ironic
+++ b/lib/nova_plugins/hypervisor-ironic
@@ -47,6 +47,8 @@ function configure_nova_hypervisor {
         iniset $NOVA_CONF filter_scheduler use_baremetal_filters True
     fi
 
+    iniset $NOVA_CONF filter_scheduler host_subset_size 999
+
     iniset $NOVA_CONF DEFAULT ram_allocation_ratio 1.0
     iniset $NOVA_CONF DEFAULT reserved_host_memory_mb 0
     # ironic section