1.7. Upgrade duration and impact

The durations in the following table were recorded in a test environment that consisted of an overcloud with 200 nodes, and 9 Ceph Storage hosts with 17 object storage daemons (OSDs) each. The durations in the table might not apply to all production environments. For example, if your hardware has low specifications or an extended boot period, allow for more time with these durations. Durations also depend on network I/O to container and package content, and disk I/O on the host.

To accurately estimate the upgrade duration for each task, perform these procedures in a test environment with hardware that is similar to your production environment.