Master, Slave, and Client node Assignment

Assign Masters

The Cluster Install wizard assigns the master components for selected services to appropriate hosts in your cluster and displays the assignments in Assign Masters. The left column shows services and current hosts. The right column shows current master component assignments by the host, indicating the number of CPU cores and the amount of RAM installed on each host.

1. To change the host assignment for a service, select a hostname from the drop-down menu for that service.
2. To remove a ZooKeeper instance, click the green - icon next to the host address you want to remove.
3. When you are satisfied with the assignments, choose Next.

Assign Slaves and Client

The Cluster Install wizard assigns the slave components, such as DataNodes, NodeManagers, and RegionServers, to appropriate hosts in your cluster. It also attempts to select hosts for installing the appropriate set of clients.

Steps

1. Use all or none to select all of the hosts in the column or none of the hosts, respectively. If a host has an asterisk next to it, that host is also running one or more master components. Hover your mouse over the asterisk to see which master components are on that host.
2. Fine-tune your selections by using the check boxes next to specific hosts.
3. When you are satisfied with your assignments, choose Next.