Load Balancing for Different Tier

Question

Sir My boss is asking to deployment Presentation Tier On one server Business layer on second server Data Access Layer on third server for the same application and we want to use load balancing for that application. Is is possible and will I get advantage of this concept. If it is possible Kindly help me the method and also suggest me load balancing for the application in different servers. Regards Shankar Chaurasia

Praveen Kumar Sreeram · Answer

Hi Shankar Chaurasia Basically your Boss's concern is to improve the performance of the application. There are multiple options. Option1: Scale-out individual application components to multiple servers Option2: Scale-out the entire application to multiple servers If you want to go with Option1 then your application architecture should support this. So all your Business Logic and Data access logic should be in some Web API / Web Services so that you can deploy those webservices in different server and the same can be consumed in your Presentation Layer. If your current architecture doesn;t support this you might have to make log of changes to all of your components. Alternatively the option2 will let you create a Virtual Network with Network Load Balancer where it uses some algorithm to server the requests by the Servers which are free. We would have to use multiple WebServers that serve the requests. NLB will decide to which server the traffic has to be diverted. For this the only code change (rather configruation change) is to set your Session use SQL Server instead of In Proc. Basically all your user sessions are stored in SQL Server. And you would need to deploy all your codes in all the Web Servers. Also Configuring the Option2 is not a Developer's Cup of cake. You should contact your IT Guys to configure the NLB Hope you got a high level understanding of the options available. Thanks Prawin