nmem_malloc(l->nmem, sizeof(struct record_metadata*) * service->num_sortkeys);
memset(cluster->sortkeys, 0,
sizeof(union data_types*) * service->num_sortkeys);
nmem_malloc(l->nmem, sizeof(struct record_metadata*) * service->num_sortkeys);
memset(cluster->sortkeys, 0,
sizeof(union data_types*) * service->num_sortkeys);