diff --git a/sysadmin/grid5000/cassandra/.gitignore b/sysadmin/grid5000/cassandra/.gitignore
index 58e0d22..ed3c69a 100644
--- a/sysadmin/grid5000/cassandra/.gitignore
+++ b/sysadmin/grid5000/cassandra/.gitignore
@@ -1,7 +1,8 @@
 .terraform
 terraform.tfstate*
 .vagrant
 playbook.retry
 .credentials
 .vault_password
 out
+environment.cfg
diff --git a/sysadmin/grid5000/cassandra/environment.cfg b/sysadmin/grid5000/cassandra/environment-day.cfg
similarity index 52%
copy from sysadmin/grid5000/cassandra/environment.cfg
copy to sysadmin/grid5000/cassandra/environment-day.cfg
index f8054b0..1af0dcd 100644
--- a/sysadmin/grid5000/cassandra/environment.cfg
+++ b/sysadmin/grid5000/cassandra/environment-day.cfg
@@ -1,17 +1,18 @@
 export G5K_SITE='rennes.grid5000.fr'
 
-export BEST_EFFORT_CLUSTER='paravance'
-
 export CASSANDRA_HOSTS="parasilo-2 parasilo-3 parasilo-4 parasilo-5"
 export CASSANDRA_DISKS_COUNT=5
-export STORAGE_HOSTS="paravance-1"
+export STORAGE_HOSTS=""
 export JOURNAL_CLIENT_HOSTS=""
-export MONITORING_HOSTS="paravance-2"
+export MONITORING_HOSTS="paravance-1"
+export BEST_EFFORT_CLUSTER="paravance"
 
+# Use to segment the host type (check ansible/host.yml)
+export BEST_EFFORT_EXCLUDED_NODES="paravance-1,paravance-2,paravance-3,paravance-4,paravance-5,paravance-6,paravance-7,paravance-8,paravance-9,paravance-10"
 # export CASSANDRA_NB_DISK_PER_NODE=5
 export DISK_RESERVATION_DURATION=$((7 * 24)) # 1day during tests
-export NODE_RESERVATION_DURATION=12 # in hours
+export NODE_RESERVATION_DURATION=4 # in hours
 
 export SSH_USER=root
 # export SSH_OPTIONS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
 export SSH_OPTIONS=""
diff --git a/sysadmin/grid5000/cassandra/environment.cfg b/sysadmin/grid5000/cassandra/environment-long.cfg
similarity index 72%
rename from sysadmin/grid5000/cassandra/environment.cfg
rename to sysadmin/grid5000/cassandra/environment-long.cfg
index f8054b0..a2f978c 100644
--- a/sysadmin/grid5000/cassandra/environment.cfg
+++ b/sysadmin/grid5000/cassandra/environment-long.cfg
@@ -1,17 +1,17 @@
 export G5K_SITE='rennes.grid5000.fr'
 
 export BEST_EFFORT_CLUSTER='paravance'
 
 export CASSANDRA_HOSTS="parasilo-2 parasilo-3 parasilo-4 parasilo-5"
 export CASSANDRA_DISKS_COUNT=5
-export STORAGE_HOSTS="paravance-1"
+export STORAGE_HOSTS="parasilo-20 parasilo-21 parasilo-22 parasilo-23 parasilo-25"
 export JOURNAL_CLIENT_HOSTS=""
-export MONITORING_HOSTS="paravance-2"
+export MONITORING_HOSTS="parasilo-19"
 
 # export CASSANDRA_NB_DISK_PER_NODE=5
 export DISK_RESERVATION_DURATION=$((7 * 24)) # 1day during tests
-export NODE_RESERVATION_DURATION=12 # in hours
+export NODE_RESERVATION_DURATION=13 # in hours
 
 export SSH_USER=root
 # export SSH_OPTIONS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
 export SSH_OPTIONS=""