diff --git a/wally/suits/io/ceph.cfg b/wally/suits/io/ceph.cfg
index 5593181..a10adfb 100644
--- a/wally/suits/io/ceph.cfg
+++ b/wally/suits/io/ceph.cfg
@@ -1,12 +1,16 @@
 [defaults]
-wait_for_previous
-group_reporting
-time_based
+wait_for_previous=1
+group_reporting=1
+time_based=1
 buffered=0
 iodepth=1
 softrandommap=1
 filename={FILENAME}
 NUM_ROUNDS=7
+thread=1
+
+# this is critical for correct results in multy-node run
+randrepeat=0
 
 NUMJOBS={% 1, 5, 10, 15, 40 %}
 NUMJOBS_SHORT={% 1, 2, 3, 10 %}