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types of Clustering in J2EE September 4, 2006

Posted by Allu in J2EE.
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J2EE clusters usually come in two flavors: shared nothing and shared disk.

In a shared-nothing cluster, each application server has its own file systems with its own copy of applications running in the cluster. Application updates and enhancements require updates in every node in the cluster. With this setup, large clusters become maintenance nightmares when code pushes and updates are released.

In contrast, a shared-disk cluster employs a single storage device that all application servers use to obtain the applications running in the cluster. Updates and enhancements occur in a single file system and all machines in the cluster can access the changes.

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