When you have decided to employ a network load balancer to manage and direct the network traffic to your local network servers, you have a choice of load balancing methods to maximize your server pool capacities and capabilities. The load balancers will have to be configured for the method you choose depending on the load balancing technique. The load balancer is positioned between the users and the servers that will control and direct the network traffic to and from the cluster of servers. Here the load balancer would work just as a traffic cop who monitors server performance and direct the traffic to the server/servers that would offer the best response.
With a network load balancer it allows you to use load balancing methods that would split the role of the DNS server from the content server. With this you can now optimize the performance of your network. This method of putting the DNS server on the load balancer instead of the content server has two advantages: one, each server is now dedicated to its specific role and two, risks of task overload and thereby chances of poor performance are to a great extent reduced.
So, what actually you can do with round robin content network load balancer? It is a simple means where the request for content access is responded to by the load balancer on a rotation. In this, the first request gets access to the content server that is available first with its IP address, and then the second access request is sent to the IP address of the second server. The moment a specific IP address has been assigned, the IP address is sent to the last of the IP address list. And, then as more and more IP addresses are assigned, it crawls up automatically and finally becomes available again. How quickly one IP address can return to the top naturally depends on the number of servers available in the round robin server cluster. In these load balancing methods the process simply works as a server allocation technique and on a constant looping method.
While adopting the load balancing methods you must also know about the best environments in which they are going to work optimally. For the DNS round robin network load balancer we talked about what works best when the web servers are geographically distributed. For example, if you have a single domain name for your company, you may develop four entirely identical home pages for your company and upload them on four physical servers that are located in North America, Europe, Asia and Africa. So, each time they receive a request, the first one will be sent to the North America-based server, the second to the European server and the subsequent ones to the Asian and African server.
These load balancing methods are easy to implement but you must make sure that they work for your system. There are other network load balancer techniques that may work for you better than this DNS round robin one. Talk to the experts and choose wisely so that you can provide the best service to your clients.
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Published on: May 18, 2014
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