There are several testing frameworks for Openstack Swift, but most of them are no longer maintained or have some other problems to test larger Ceph clusters properly under load.
At this point we decided to use getput by Mark Seger.
Test Setup
Ceph Cluster
Our Ceph test cluster consisted of 108 Ceph nodes with a total of 2592 osds. The network was a spine-leaf architecture.
Openstack Compute Nodes
12 compute nodes with 56 HT cores and 100 GBit/s network connectivity.
Test setup
gpsuite
Sources: