storage->constraint = lmm_constraint_new(storage_maxmin_system, storage, Bconnexion);
storage->constraint_read = lmm_constraint_new(storage_maxmin_system, storage, Bread);
storage->constraint_write = lmm_constraint_new(storage_maxmin_system, storage, Bwrite);
xbt_lib_set(storage_lib, id, SURF_STORAGE_LEVEL, storage);
storage->constraint = lmm_constraint_new(storage_maxmin_system, storage, Bconnexion);
storage->constraint_read = lmm_constraint_new(storage_maxmin_system, storage, Bread);
storage->constraint_write = lmm_constraint_new(storage_maxmin_system, storage, Bwrite);
xbt_lib_set(storage_lib, id, SURF_STORAGE_LEVEL, storage);