Hello everybody, I tried to install a mysql cluster on a single machine for testing the application. To do that I've followed this How to => http://www.howtoforge.com/loadbalanced_mysql_cluster_debian. Everything is okay for the management node but when I try to lunch the mysql server for data/sql node I've this error : Starting MySQL kill: 412: No such process * I use the version 6.2 of mysql-cluster maybe this is the reason of this failure. Below you will find my config.ini and my my.cnf. Config.ini Code: [NDBD DEFAULT] NoOfReplicas=1 # Section for the cluster management node [NDB_MGMD] # IP address of the management node (this system) HostName=127.0.0.1 # Section for the storage nodes [NDBD] # IP address of the first storage node HostName=127.0.0.1 DataDir= /var/lib/mysql-cluster # one [MYSQLD] per storage node [MYSQLD] my.cnf Code: [MYSQLD] user=mysql basedir=/usr/local/mysql/ datadir=/data/mysql/ ndb-cluster-connection-pool=1 ndbcluster ndb-connectstring="127.0.0.1" ndb-force-send=1 ndb-use-exact-count=0 ndb-extra-logging=1 ndb-autoincrement-prefetch-sz=256 engine-condition-pushdown=1 #REPLICATION SPECIFIC - GENERAL #server-id must be unique across all mysql servers participating in replication. #server-id=X #REPLICATION SPECIFIC - MASTER #log-bin #REPLICATION SPECIFIC - SLAVE #slave-allow-batching #skip-slave-start Thank you for helping me and have a good day.