Clustering and Load Balancing

[Bharatesh H Kakamari]

What is Clustering and Load Balancing ?

[Suneel Setlur]

Hi
A high degree of scalability & / performance is required for any E-Business.This depends on transparent Replication, load balancing and failover. A combination of these three is called Clustering. There are 2 types of clustering.
1)Web clustering, which ensures that the Web pages that your customer is requesting (e.g.,
portfolio view, order status) are available and delivered in near real time. Web page
clustering also requires the efficient replication of the user�s transient state (e.g., the contents
of a Web shopping cart).
2)Component/object clustering, which ensures that EJB business
services and objects (e.g., ordering & billing services, customer accounts, inventory) are both
efficient and available.
Both kinds of clustering are essential for delivering mission-critical information
systems over the Web
Hope it helps
Suneel

[This message has been edited by Suneel Setlur (edited March 08, 2001).]

[Malu Sivasankar]

J2EE application server vendors define a cluster as a group of machines working together to transparently provide enterprise services (support for JNDI, EJB, JSP, HttpSession and component failover, and so on).
Please read this article J2EE Clustering for more information