Wednesday, April 25, 2012

What is Service Application Framework?

 => Replacement for the Shared Services Provider  in MOSS 2007
=> API provided by backend application servers and consumed by front-end application servers.
=> Used for developing middle-tier applications that are hosted in SharePoint and provide data and   
      resources to other SharePoint features
=> Enables services to be shared between computers on a server farm
=> Load balance and manage services
=> Out of the box - 20 built in services
=> Certain objects automatically backed up and restored
=> Ideal for deploying, managing and discovering WCF service clients and endpoints.
=> Windows Powershell support
=> Timer job infrastructure available at Service-scope
=> Use of SharePoint configuration store and support for storing data in SharePoint managed custom database is available


Load Balancing

=> Use Round robbing load balancing
=> Service application proxy method invocations must be routed thru the front end web server to an
      appropriate app server by using a load balancing tool.
=> Calls between frontend and app servers to require separate external load balancer than the load         
      balancing for front-end web servers
=> SPRoundRobinServiceLoadBalancer can be enhanced or replaced by third party.

Management and Administration

=> Services plug their management UI into SharePoint Service Management page
=> Common admin tools such as upgrade, backup, restore and account management
=> Common UI to manage, start, stop, group, associate, federate and backup SharePoint services.
=> Can define specialized admin roles and can be delegated to users who are not farm admins
=> Security trimmed

Security

•Claims-based identity model  Example - Search service

Benefits

The Service Application Framework allows developers to provide load balanced middle-tier resources that can be managed through SharePoint and leverage the full power of SharePoint 2010.

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