Before revision:  We first carry out the analysis under the low-traffic regime in which case the system consists of at most one download request at any time. In this setting, we compare the download time in  systems with availability, maximum distance separable (MDS), and replication codes.
After revision:  We first carry out the analysis under the low-traffic regime in which case the system consists of at most one request in the system, we compute the download time in systems with availability, maximum distance separable (MDS), and replication codes.