3. High : The expected load includes more than 1000 write transactions per second. 

SSH properties are described in the following list: 

• Key-Based SSH : Check this box to use key-enabled login to the remote host. If checked, the key user and passphrase must also be supplied; otherwise, a user and password for a remote login account are needed. 

• User : Name of user with remote login access. 

• Password : Password for remote user. 

• Key user : Name of the user for whom the key is valid, if not the same as the operating system user. 

• Key passphrase : Passphrase for the key, if required. 

• Key file : Path to the key file. The default is ~/.ssh/id_rsa . 

The SSH properties set on this page apply to all hosts in the cluster. They can be overridden for a given host by editing that hosts’s properties on the Define Hosts  screen. 

Two installation properties can also be set on this screen: 

• Install MySQL Cluster : This setting determines the source from which the Auto-Installer installs NDB Cluster software, if any, on the cluster hosts. Possible values and their effects are listed here: 

1. DOCKER : Try to install the MySQL Cluster Docker image from https://hub.docker.com/r/ mysql/mysql-cluster/  on each host 

2. REPO : Try to install the NDB Cluster software from the MySQL Repositories on each host 

3. BOTH : Try to install either the Docker image or the software from the repository on each host, giving preference to the repository 

4. NONE : Do not install the NDB Cluster software on the hosts; this is the default 

• Open FW Ports : Check this check box to have the installer attempt to open ports required by NDB CLuster processes on all hosts. 

The next figure shows the Define Cluster  page with settings for a small test cluster with all nodes running on localhost : 

