Note: *write* and *seq* must be run on the same host otherwise the
objects created by *write* will have names that will fail *seq*.
-:command:`cleanup`
+:command:`cleanup` [ --run-name *run_name* ] [ --prefix *prefix* ]
+ Clean up a previous benchmark operation.
+ Note: the default run-name is "benchmark_last_metadata"
:command:`listxattr` *name*
List all extended attributes of an object.