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 . We demonstrate that availability codes can reduce download time in some settings , but are not always optimal.
After 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 , we demonstrate that availability codes can reduce download time in some settings , but are not always optimal.