1. What is clustering? How do weblogic instances communicate
in a clustered environment!
2. In a cluster, if one of the servers has issues and is not
accessible, will the other servers know about it? and how??
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Answer Posted / kruthi
1)A WLS clustr consists a group of server instances that
work together and look like a single instance to the
client.Cluster provides increased scalability, high
availability, load balancing, reliability etc.Through
multicaste adresses all the WLserver will communicate
through Heart Beat.For ever few sec the WLS instances will
release thir heart beats and if any of the server instances
does not release the heart beat then that server in
unavailable.And the stub also refreshes its list very
periodicaly so that it can know the available server
instances.
2)Yes, the other server will know through Heart Beats.
| Is This Answer Correct ? | 41 Yes | 3 No |
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