Much more dentries than inodes, is that normal?

[superdebuger@xxxxxxxxx (Xiaoxi Chen)]

Hi,

      From the admin socket of mds, I got following data on our
production cephfs env, roughly we have 585K inodes and almost same
amount of caps, but we have>2x dentries than inodes.

      I am pretty sure we dont use hard link intensively (if any).
And the #ino match with "rados ls --pool $my_data_pool}.

      Thanks for any explanations, appreciate it.


"mds_mem": {
        "ino": 584974,
        "ino+": 1290944,
        "ino-": 705970,
        "dir": 25750,
        "dir+": 25750,
        "dir-": 0,
        "dn": 1291393,
        "dn+": 1997517,
        "dn-": 706124,
        "cap": 584560,
        "cap+": 2657008,
        "cap-": 2072448,
        "rss": 24599976,
        "heap": 166284,
        "malloc": 18446744073708721289,
        "buf": 0
    },



Xiaoxi