查询ceph journal的地方
ceph --admin-daemon /var/run/ceph/ceph-osd.0.asok config show | grep osd_journal
"osd_journal": "\/var\/lib\/ceph\/osd\/ceph-0\/journal", "osd_journal_size": "5120",
ceph journal操作
原文：http://www.cnblogs.com/menkeyi/p/6980062.html
