Ceph

There is a rbd which has many objects. I found the object_info_t.last_reqid.name.type() of some objects is client. However, some is osd. Anybody knows that? Look forward to your reply. Thank you.
like this：

"last_reqid": "client.15151.0:31483"


"last_reqid": "osd.20.0:32483"