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SERVER LOAD BALANCER: KEEP YOUR APPLICATION UPTIME

March 21, 2018
Arpine Minasyan
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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

Load balancer maintains session persistence and ensures user-friendly experiences while the servers doesn’t respond or are overburdened. It also monitors the server performance and makes health checks. To boil it all down, Load balancer is responsible for keeping applications up and running in the event of one or more unresponsive servers.

THE TYPES OF LOAD BALANCERS 

Typically 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)

Layer 4 balancers distribute traffic based on the data from Network and Transport level protocols like IP address or TCP port. On the other hand, Layer 7 load balancers are dealing with more complicated data. They route the traffic based on application level protocols such as HTTP.

Server load balancer, traffic optimization tool

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.

WHY YOU SHOULD CARE ABOUT IT?

No matter how awesome and user-friendly your application is, if it doesn’t run and serve properly you will most probably lose your customers after a short period of time. If the servers on which your application is running are overwhelmed with high-volume traffic, data retrieval becomes a tough process. Server request errors and traffic failures are simple issues that server load balancer can solve. 

HOW CAN IP2VOICE HELP?

IP2Voice provides high-performance server hosting services backed with impeccable service.

With our servers, the response and transaction times of your application and cloud service will be significantly reduced. With caching, compression, SSL acceleration, and other methods you will get better application performance.  Consider that if you’re running cloud-based business your ROI is directly proportional to your application and server performance.

Opt to reach greater server efficiency for your VoIP application with IP2Voice server hosting services. Around-the-clock server uptime is guaranteed.


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