qa: thrash max_mds and deactivate ranks

Fixes: http://tracker.ceph.com/issues/10792
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

diff --git a/qa/tasks/mds_thrash.py b/qa/tasks/mds_thrash.py
index 1fcc9fc6a4890942d6211bf9e77ca0a04616c99a..75d236d105e2cd4fae143bfaa986a851809aeaa2 100644 (file)
--- a/qa/tasks/mds_thrash.py
+++ b/qa/tasks/mds_thrash.py
@@ -151,7 +151,7 @@ class MDSThrasher(Greenlet):
     thrash_in_replay: [default: 0.0] likelihood that the MDS will be thrashed
       during replay.  Value should be between 0.0 and 1.0.
 
-    thrash_max_mds: [default: 0.0] likelihood that the max_mds of the mds
+    thrash_max_mds: [default: 0.05] likelihood that the max_mds of the mds
       cluster will be modified to a value [1, current) or (current, starting
       max_mds]. When reduced, randomly selected MDSs other than rank 0 will be
       deactivated to reach the new max_mds.  Value should be between 0.0 and 1.0.
@@ -216,7 +216,7 @@ class MDSThrasher(Greenlet):
         self.stopping = Event()
 
         self.randomize = bool(self.config.get('randomize', True))
-        self.thrash_max_mds = float(self.config.get('thrash_max_mds', 0.0))
+        self.thrash_max_mds = float(self.config.get('thrash_max_mds', 0.05))
         self.max_thrash = int(self.config.get('max_thrash', 1))
         self.max_thrash_delay = float(self.config.get('thrash_delay', 120.0))
         self.thrash_in_replay = float(self.config.get('thrash_in_replay', False))