You may choose what componets are you going to install on this screen and what installation type will be done.
Possible chooses are:
Qmaster host - Main component in Grid Engine software. If you want to install Grid Engine you must install exactly one qmaster component per Grid Engine installation.
Execution host(s) - Hosts that execute the tasks (jobs).
Shadow host(s) - Shadow hosts provide a high availability feature to the cluster. In case that the qmaster fails (crash, network issue), one of the shadow hosts will take over the qmaster responsibility.
Berkeley db host - Selecting it implies a Berkeley db host spooling option. The Grid Engine than spools data to a remote server. Not recommended as default option!
Installation types are as follows:
Express installation – Targeted for the first time users of Grid Engine. Has significantely reduced set of configuration screens and simplified host selection panel.
Custom installation – Prompts for all configuration parameters and includes more advanced host selection.