Ceph

hi ,
am using, ubuntu 12.04 lts operating with kernel version '3.2.0-23-generic'
and ceph version '0.52-958-gdb7c419 (db7c41934b6e894c7d5a01ddf1a3592744c3d73c)' in single machine for rgw testing.

when am executing the command 'radosgw-admin log show --bucket = bucket --bucket-id = 11221.1', getting the following error message : object or (at least one of date, bucket, bucket-id) were not specified . i have specified the bucket name and bucket id even though it showing same error .
the following is the output format:
lokesh@lokesh:~$ radosgw-admin log show --bucket = bucket --bucket-id = 11221.1
object or (at least one of date, bucket, bucket-id) were not specified

verifcation :
lokesh@lokesh:~$ radosgw-admin bucket stats --uid=radosgw
[ { "bucket": "bucket",
"pool": ".rgw.buckets",
"id": "11221.1",
"marker": "11221.1",
"owner": "radosgw",
"usage": {}}]

log show is failed to display bucket log details .
please reply.
thanks

Lokesh