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what is differences between OS cluster and application server cluster?

 
Ranch Hand
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Hi
Thank you for reading my post
What is differences between an application server cluster and some OS related load balancing?
for example windows 2003 can load balance with its domain members, is there any differences between this load balancig and application server cluster that balance the load between several application servers ?

thanks
 
author and cow tipper
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I think the big difference is WHAT is being load balancing.

What is a Windows cluster balancing? In a domain, it's really the user registry, right?

With a J2EE application, you're workload managing somethign totally different- you're workload managing web based requrest for resources, and also need to replicate users sessions and data across clusters. An OS would not be capable of doing this.

Plus, things like sticky sessions, which J2EE requires, isn't even in the realm of a Windows or Linux OS.

The differences are just too significant.

Interesting question though.

-Cameron McKenzie
 
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