ceph pg dump filtered

root@ceph0:~# ceph pg dump --format=json|fgrep kb_
      "kb_used": 3592611160,
      "kb_avail": 2224003840,
          "kb_used": 354151840,
          "kb_avail": 120174908,
          "kb_used": 336342076,
          "kb_avail": 151804992,
          "kb_used": 350478744,
          "kb_avail": 137668324,
          "kb_used": 378779252,
          "kb_avail": 109367816,
          "kb_used": 213842552,
          "kb_avail": 260639768,
          "kb_used": 250024568,
          "kb_avail": 238122500,
          "kb_used": 253741716,
          "kb_avail": 234405352,
          "kb_used": 285233524,
          "kb_avail": 202913544,
          "kb_used": 218973880,
          "kb_avail": 255508440,
          "kb_used": 250687400,
          "kb_avail": 237459668,
          "kb_used": 428554676,
          "kb_avail": 59592392,
          "kb_used": 271800932,
          "kb_avail": 216346136,
root@ceph0:~#