Clusters with multiple points of entry setup
This scenario gives you the ability to provide the highest availability to the users with no single point of failure in the
entire cluster setup.
In this scenario, multiple cluster services provide authentication and load balancing services and access to multiple servers.
The multiple cluster services setup has multiple entry points. A Domain Name Server (DNS) acts as a single point-of- entry
for users and performs round-robin distribution of incoming requests to the configured cluster services. The cluster services
are responsible for returning the correct address of the least busy server to which the users can connect.
Figure 3: Multiple points of entry setup overview
In above scenario, there are two levels of load balancing:
| • | The DNS performs load balancing (simple round-robin) regardless of the load on the servers. |
| • | The cluster services perform load balancing on the actual load on each server. |
The number and location of the cluster services does not have to match the number and location of servers. Both components
can be installed on different machines.