1 [root@compute1 1.0_head]# pwd
 2 /var/lib/ceph/osd/ceph-3/current/1.0_head
 3 attr -l  rbd\\udata.3b2f23752117.0000000000000f47__head_501C5A00__1
 4 Attribute "cephos.spill_out" has a 2 byte value for rbd\udata.3b2f23752117.0000000000000f47__head_501C5A00__1
 5 Attribute "ceph._" has a 250 byte value for rbd\udata.3b2f23752117.0000000000000f47__head_501C5A00__1
 6 Attribute "ceph._@1" has a 23 byte value for rbd\udata.3b2f23752117.0000000000000f47__head_501C5A00__1
 7 Attribute "ceph.snapset" has a 31 byte value for rbd\udata.3b2f23752117.0000000000000f47__head_501C5A00__1
 8 
 9 attr -q -g "ceph._" rbd_data.3b2f23752117.0000000000000f47 > 1.txt
10 
11 attr -q -g "ceph._@1" rbd\\udata.3b2f23752117.0000000000000f47__head_501C5A00__1 >> 1.txt
12 
13 ceph-dencoder import 1.txt type object_info_t decode dump_json  
14 {
15     "oid": {
16         "oid": "rbd_data.3b2f23752117.0000000000000f47",
17         "key": "",
18         "snapid": -2,
19         "hash": 1344035328,
20         "max": 0,
21         "pool": 1,
22         "namespace": ""
23     },
24     "version": "61‘181",
25     "prior_version": "0‘0",
26     "last_reqid": "client.15151.0:31483",
27     "user_version": 181,
28     "size": 8388608,
29     "mtime": "2016-11-24 18:34:36.561018",
30     "local_mtime": "2016-11-24 18:34:36.638635",
31     "lost": 0,
32     "flags": 52,
33     "snaps": [],
34     "truncate_seq": 0,
35     "truncate_size": 0,
36     "data_digest": 3787114157,
37     "omap_digest": 4294967295,
38     "watchers": {}
39 }