A bit similar to the rados bench, rados load-gen is another interesting tool provided by Ceph, which runs out-of-the-box. As the name suggests, the rados load-gen tool can be used to generate load on a Ceph cluster and can be useful to simulate high load scenarios.
Let's try to generate some load on our Ceph cluster with the following command:
# rados -p rbd load-gen \ --num-objects 50 \ --min-object-size 4M \ --max-object-size 4M \ --max-ops 16 \ --min-op-len 4M \ --max-op-len 4M \ --percent 5 \ --target-throughput 2000 \ --run-length 60
The syntax for rados load-gen is as follows:
# rados -p <pool-name> load-gen
--num-objects: The total number of objects--min-object-size: The minimum object size in bytes--max-object-size: The maximum object size in bytes--min-ops: The minimum number of operations--max-ops: The maximum number of operations--min-op-len: The minimum operation length--max-op-len: The maximum...