iov[1].iov_len = 1;
status = (dbp->seq)(dbp, &key, &data, R_FIRST);
while (status == RET_SUCCESS) {
iov[0].iov_base = data.data;
iov[0].iov_len = data.size;
iov[1].iov_len = 1;
status = (dbp->seq)(dbp, &key, &data, R_FIRST);
while (status == RET_SUCCESS) {
iov[0].iov_base = data.data;
iov[0].iov_len = data.size;