diff --git a/wally/suits/io/rrd.cfg b/wally/suits/io/rrd.cfg
index 3383dce..86a73c5 100644
--- a/wally/suits/io/rrd.cfg
+++ b/wally/suits/io/rrd.cfg
@@ -1,14 +1,34 @@
 [global]
 include defaults.cfg
+ramp_time=30
+runtime=120
+numjobs={% 1,10 %}
+direct=1
+rw={% randwrite, randread %}
 
 # ---------------------------------------------------------------------
-[rws_{TEST_SUMM}]
-blocksize=4k
-rw=randwrite
-sync=1
-ramp_time=15
-runtime=120
-numjobs={% 50,150 %}
+#[test_{TEST_SUMM}]
+#blocksize=1m
+
+# ---------------------------------------------------------------------
+#[test_{TEST_SUMM}]
+#blocksize=4m
+
+# ---------------------------------------------------------------------
+#[test_{TEST_SUMM}]
+#blocksize=16m
+
+# ---------------------------------------------------------------------
+[test_{TEST_SUMM}]
+blocksize=64m
+rw=randread
+numjobs=1
+
+# ---------------------------------------------------------------------
+[test_{TEST_SUMM}]
+blocksize=4m
+rw=write
+numjobs=1
 
 # ---------------------------------------------------------------------
 # [rws_{TEST_SUMM}]