Before revision:  For low-traffic regime , when there is at most one request in the system, we compute the download time in closed-form and compare it across systems with availability, maximum distance separable (MDS), and replication codes .
After revision:  For low-traffic regime , when there is at most one request in the system, we compute the download time . By comparison across systems with availability, maximum distance separable (MDS), and replication codes .