usage: ceph_objectstore_bench [flags]
	 --size
	       total size in bytes
	 --block-size
	       block size in bytes for each write
	 --repeats
	       number of times to repeat the write cycle
	 --threads
	       number of threads to carry out this workload
	 --multi-object
	       have each thread write to a separate object

  --conf/-c FILE    read configuration from the given configuration file
  --id/-i ID        set ID portion of my name
  --name/-n TYPE.ID set name
  --cluster NAME    set cluster name (default: ceph)
  --setuser USER    set uid to user or uid (and gid to user's gid)
  --setgroup GROUP  set gid to group or gid
  --version         show version and quit

  -d                run in foreground, log to stderr
  -f                run in foreground, log to usual location

  --debug_ms N      set message debug level (e.g. 1)