In this recipe, we will perform tests to discover the baseline performance of the network between the Ceph OSD nodes. For this, we will be using the iperf utility. Make sure that the iperf package is installed on the Ceph nodes. iperf is a simple, point-to-point network bandwidth tester that works on the client-server model.

To start network benchmarking, execute iperf with the server option on the first Ceph node and with the client option on the second Ceph node.