Clustered system:
A clustered system use multiple CPU to accomplish different task. clustered system consist of
two or more individual system coupled together. Clustered system share storage and closely linked via
LAN networking.
The clustered system is usually performed to provide high availability. The word will never stop even if a
node is failed. Each node in the clustered systems contains the cluster software. This software
monitors the cluster system and makes sure it is working as required. If any one of the nodes in
the clustered system fail, then the rest of the nodes take control of its storage and resources
and try to restart.
Types of clustered system:
1) Asymmetric clustered:
In this form one machine is in hot standby mode ( monitor other machine) and
other machine run the application. The hot standby machine performed nothing. It only monitor the
server. It becomes the active server if any server fails.
2) Symmetric clustered:
In this form two or more machine fun the application. They also monitor each other at
the same time. This mode is more efficient because it uses all available machines
