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Clustering

 
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I have couple of questions.
1. My understanding is DNS Round-robin is for Load sharing and not for load balancing. But Oracle site (Under EJB link) says it is for load balancing.
2. what problem arises when clustering EJB servers ?
Thanks
 
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>1. My understanding is DNS Round-robin is for Load sharing and not for
>load balancing. But Oracle site (Under EJB link) says it is for load
>balancing.
Yes, DNS-RR is Load Sharing, because the load is distributed arbitrarily without any feedback from the components, if a server goes down clients will continue to be directed to it.
>2. what problem arises when clustering EJB servers?
No problems :-)
You only have to follow some rules and use the right appserver.
E.g. Websphere cannot replicate HTTPSession, all others can. :-)
Regards
Roger
 
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