int SIMIX_STORAGE_LEVEL = -1; // Simix storage level
int MSG_STORAGE_LEVEL = -1; // Msg storage level
int ROUTING_STORAGE_LEVEL = -1; // Routing for storage level
-int ROUTING_STORAGE_HOST_LEVEL = -1;
int SURF_STORAGE_LEVEL = -1;
xbt_lib_t storage_type_lib;
int ROUTING_STORAGE_TYPE_LEVEL = -1; //Routing for storage_type level