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Oracle SOA BPEL Process Manager 11gR1 – A Hands-on Tutorial by Ravi Saraswathi, Jaswant Singh

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Load balancers

Most of the enterprise implementations of web services will demand high availability. In some cases it will be a global high availability that is usually achieved via the system architecture's designs and deployments leveraging multi sites in active-active or active-passive. The passive site is either standby (manual process to fail over and fail back) or hot standby (automatic process to fail over and fail back) to provide the services if the primary site goes down. The load balancers are also used to achieve the horizontal scalability. Load balancers for web services are implemented at either L7 (application Layer) also known as Global Server Load Balancer (GSLB) or Global Traffic Manager (GTM), or at L4 (Transport Layer) also ...

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