If you are a VoIP software owner, you will definitely know that it must serve hundreds of thousands of concurrent requests from users or clients and smoothly return the application data. All the activities should be done along with delivering consistent calling and HD voice. Here Load balancer comes into play. Let’s understand what it is and how it can help.
WHAT IS LOAD BALANCING?Server load balancing is a traffic optimization tool - nothing more, nothing less. What does it mean? Load balancer goes between your servers and client request across all the servers according to the latter’s capability. Load balancer ensures that none of your server is overloaded, which means you will have improved server performance. In case of server fails, the load balancer redirects traffic to other available servers. Even more importantly, load balancer identifies when a new server is added and automatically sends requests to it too. It is designed to increase productivity and performance of a network by allowing users to access sensitive business data and applications without slow response time and connection fails regardless of location.
HOW DOES LOAD BALANCER WORK?Load balancer is an essential tool for every data center. It supports millions of concurrent connections for increasing application availability without affecting performance. Load balancer is a perfect tool to organize your VoIP application traffic. All the benefits lie in the cool functionalities load balancer has:
- It evenly distributes the clients requests or network traffic across the servers
- Sends requests to only those servers that are online and capable of handling appropriate amount of network load
- It allows adding or removing the servers based on demand and starts to distribute traffic among them
THE TYPES OF LOAD BALANCERSTypically Load Balancers are grouped into two categories: Layer 4 and Layer 7 load balancers. You may wonder what we are talking about. As a rule, the range of load balancer depends on how well it processes with different types of data. This data is passing through 7 levels of OSI (Open Systems Interconnects.)
- Application (Layer 7)
- Presentation (Layer 6)
- Session (Layer 5)
- Transport (Layer 4)
- Network (Layer 3)
- Data Link (Layer 2)
- Physical (Layer 1)
Both of these load balancers are distributing data based on a range of industry standard algorithms. Let’s explore four of the most popular ones together.
- Round Robin: This method continously rotates a list of services that are attached to it. When the virtual server receives a request it assigns the connection to the first service in the list then moves that service to the bottom of the list.
- The custom load method: When using this method, the load balancing appliance chooses a service that is not handling any active transactions. If all of the services in the load balancing setup are handling active transactions, the appliance selects the service with the smallest load.
- Least connections: The default method. When a virtual server is configured to use the least connection it selects a service with the fewest active connections.
- Least response time: This method selects a service with the fewest active connections and the lowest average response time.
HOW WILL YOU BENEFIT USING LOAD BALANCER?
- The speed at which your software is running always stays high. It will keep you away from customer’s complaints experiencing slow page loads or inconsistent voice. If your software has a browser version too you will avoid search engine punishment.
- It’s simpler than you expect. Setting up load balancer is a hassle-free process.
- It’s built for scalability. Need to add more servers? Load balancer recognizes any new device and continues to divide work evenly between available servers. It takes into account every new machine while distributing.