sudhakarrevuru

 Profile Answers by sudhakarrevuru 

• Aug 8th, 2011

 

A cluster is group of servers. Cluster is required High availability of the application to the clients.

there are two type of clusters

Horizontal clustering
Vertical Clustering

ks9bp

 Profile Answers by ks9bp 

• Feb 28th, 2012

 

Clustering is nothing but the logical grouping of application servers.

By using clustering we can provide the high availability environments for application.

Clustering can be done in 2 types

1. Horizontal clustering
2. Vertical Clustering

sateesh babu.Ginjupalli

• May 15th, 2012

 

Clustering is grouping of the servers.Every cluster member must have the same configuration and same version.We can say each cluster member is the clone to one another. Clustering concept is for High Availability and and Workload Management.There are two types of clustering concepts are there in WAS.
1) Vertical cluster--In this scenario all the JVMs resides on the same physical machine along with the DMGR.When the JVM failover happens other JVM in that cluster will handle the request as part of the High Availability.But when the physical machine failover happens we will lose every thing
2) Horizontal Cluster--In this scenario the DMGR and the JVMs resides on the different machines.This will work even when the physical machine failover is happened.

When we compare both the clustering concepts in WAS Horizontal clustering is the reliable one.