What Is Load Balancing?
The act of “load balancing” is effectively guide all online traffic going in go through the server farm without a problem. It is like a traffic cop, as it is in front of the server and directs all requests through servers that can complete these requests rapidly. It can also take any size of the request and make sure one server isn’t being overused and decreases in its work performance. If there is a problem with one server, the load balancer can quickly change the direction of the incoming traffic to the other functioning servers. The load balancer can also automatically send in traffic into new servers that are installed.
How It Calculates the Load For Each Server
The algorithm comes in three different ways. There is round robin, where the requests are equally spread out to all of the servers. Then, there are least connections, which is when a request goes to the server having the least amount of links to its users. The overall amount of space of each server is included in the calculations of what server has the least amount of connections, so it can take in the request. Lastly, there is the IP Hash, where the IP address of the incoming request decides which server will take it because it’s the best one to do so.
The Importance of Session Persistence
This is when all requests come from the same server and go to another server. The concern is that too many of these incoming and outgoing messages could affect that server. Load balancers should be able to handle this pervasive request without problems. All of the information about that single session is placed in the system’s cache to improve its overall actions. The problem with changing servers is that it can cause issues and mix-up information between the servers.
Hardware Versus Software
For hardware-based, it has to usecustomized processors to handle all increasing traffic the website is taking in. For big companies, needing to buy bigger machines to handle that is no problem. For software-based, they work on just the product itself, meaning it is cheaper to buy and more useful to smaller businesses.
Load balancers have different things based in different software including SSL Offload and Acceleration, TCP offload, HTTP caching, and HTTP compression. The basic job of a load balancer is being able to split up all incoming requests to the number of backend servers available based on the algorithm as listed. The best load balancers as a service should have its own firewall – its security system – as well as Distributed Denial of Service (DDoS) to help divest extra requests from more successful servers.
What It Is Used In
Besides tech, where it plays a massive role in those companies that are invested in building software pieces, it is also a part of communication links. Load balancing is key in routing, where it can shift massive data among multiple servers to provide Wi-Fi and high-speed Internet to computers.