diff --git a/memtier.sh b/memtier.sh
index 260f6e8..d6eadd3 100755
--- a/memtier.sh
+++ b/memtier.sh
@@ -1,5 +1,14 @@
 #!/bin/bash
 
+if [ "$1" == "" ] 
+then
+        echo Usage: $0 <database_ip:port >&2
+        exit 1
+fi
+
+IP=${1%%:*}
+PORT=${1##*:}
+
 ## Usefull arguments
 # -d xxx: data size
 # -c xxx -t xxx: client and thread per client
@@ -16,8 +25,6 @@ memtier_benchmark --ratio 4:0 \
  --key-pattern P:P \
  --key-maximum=20000000 \
  --hide-histogram -x 1000 \
- -a adminRL123 \
  --pipeline 40 \
- -s redis-12000.cluster.avasseur-default.demo.redislabs.com -p 12000 \
+ -s ${IP} -p ${PORT} \
  -t 12 -c 10 --rate-limiting 2000
-