Major websites like YouTube, gMail are using this technique to improve the efficiency of performance of the server and manage the load accordingly. Because of heavy usage, usually services and applications or hardware service exhaust. In order to reduce the load, this technique has been introduced.

It usually depends upon two main factors such as network-transfer speed and server response time. Both servers of the equal high-configuration is required especially for programs like CGI. It may also need more of RAM mainly for running simultaneous HTTP daemon process. This is also used to manage network traffic on the servers.

A network load balancing cluster routes to one single IP to the available servers in the cluster. Each machine runs independent processes of the others duplicating resource on each server. The database is located on one server and is manageable by all servers.

Many different servers can be configured for many services like TCP, UDP or applications such as HTTP, FTP, SSL, SSL Bridge, DNS, SIP etc..

For applications such as SSL can increase loads on the servers and can be a burden on the resources mostly on the CPU. Load balancers manages web servers for SSL connection and improves the performance of the servers. It can also prevent from D-Dos Attacks by providing features such as SYN cookies and delayed-binding.

It also allows compression of HTTP services reducing the loads again. It can also help clients from different TCP to reach HTTP requests. It can buffer the resources to slow clients increasing efficiency. It allows HTTP caching which can reached without reaching the web servers.

Load balancing clusters also allows sources to control or track traffic. In order to increase safety for HTTP, it can also hide HTTP error pages. One of the main features include prioritizing traffic and Global Server Load Balancing Dedicated Server.

It can also send different request to different servers. It also manages traffic between many ISP’s. Load balancers can authenticate clients to access the websites. It also follows layer-7 security policy to ensure HTTP and HTTPS websites.

Spam detection from known spammers is yet another feature of load balancers.

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2. Tips To Reduce The Load On Server