## Cluster overview

There are three roles in a JReport Enterprise Server cluster. They are admin server, backup server, and slave server. The following is a diagram of the JReport Enterprise Server cluster infrastructure:

Each server has its own responsibility. You can set a server to perform a specific role in a JReport Enterprise Server cluster by configuring its properties. The following list shows all the tasks each server in the server cluster can complete.

| Business tasks | Administrative tasks
--- | --- | ---
| Run Report Sets | Submit Scheduled Tasks | Load-Balancing | Fail-over | Load-Balancing Administration | Security Administration | Resource Administration
Admin Server | Y | Y | Y | Y | Y | Y | Y
Backup Server | Y | Y | Y | Y | - | - | -
Slave Server | Y | Y | Y | - | - | - | -

###### Related topics:

- JReport Enterprise Server cluster