pybind/ceph_daemon: expand the order of magnitude of

daemonperf statistics to ZB

Fixes: http://tracker.ceph.com/issues/23962
Signed-off-by: Guan yunfei <yunfei.guan@xtaotech.com>

src/pybind/ceph_daemon.py

@@ -184,9 +184,11 @@ def format_dimless(self, n, width):
         Format a number without units, so as to fit into `width` characters, substituting
         an appropriate unit suffix.
         """
-        units = [' ', 'k', 'M', 'G', 'T', 'P']
+        units = [' ', 'k', 'M', 'G', 'T', 'P', 'E', 'Z']
         unit = 0
         while len("%s" % (int(n) // (1000**unit))) > width - 1:
+            if unit >= len(units) - 1:
+                break;
             unit += 1
 
         if unit > 0: