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persisting data for distributed J2ee system

par dhar
Greenhorn

Joined: Nov 16, 2006
Posts: 11
Hi all,

I have below questions for persisting data in following situations.

1.If my j2ee system has web layer and enterprise application layer then which are the best ways for transferring session from web layer to application layer?

2. What are the challanges that we may face in multi clustered environment and which could be the best solutions for those?(something like if one app server goes down then how could we shift to the next app server transparent to the users).

Can any body pls help me on these questions...

Regards
 
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subject: persisting data for distributed J2ee system