What is load balancing?

In a large computing system, a single server cannot always handle the load or demand of the network traffic. This is where load balancing comes into place. Load balancing is the method of ensuring that networks run smoothly, by spreading the network or application traffic across a group of servers. Load balancers typically exist between client devices and backend servers and distribute the incoming requests to available servers that are capable of handling the request.

Types of Load Balancers

Hardware load balancers:

Software-based load balancers:

How do load balancers work?

Load balancers can be:

Load balancers work by:

Common Load Balancing algorithms

Round Robin: Incoming requests are forwarded to different servers depending on a rotating list.

Least Connection Method: Incoming requests are forwarded to servers with the least number of active connections.

Least Response Time Method: Incoming requests are forwarded to servers on the basis of the least number of connections, as well as the time taken by a server to respond to a health monitoring request.

Least Bandwidth Method: Incoming requests are forwarded to servers with the least amount of traffic.

Hashing Methods: Incoming requests are forwarded to servers depending on hashing decisions based on various data from the incoming packet.

Custom Load Method: Incoming requests are forwarded to servers depending on the load on individual servers which is determined by querying the load on individual servers via SNMP.

Resource-based Method: Incoming requests are forwarded to servers depending on the traffic between servers based on counters, existing user sessions, CPU use, and memory.

How can Parallel RAS help with load balancing?

Parallels RAS allows you to load balance your extensive IT infrastructure without the need for complex configurations, or expensive add-ons. It balances both RDSH servers and internal components.

With Parallels RAS, server load balancing is available out of the box from the first installation. User access is distributed among healthy servers that host the same application. It also allows resource-based or round-robin based balancing. Your IT infrastructure gets dynamic provisioning of RDS servers, allowing you to scale up or scale down the number of hosts dynamically.

Parallels RAS offers high availability gateway load balancing and high redundancy, reducing the possibility of downtime and disruption. It effectively lets you reap the benefits of load balancing without having to take the economic or complexity overhead.

Download the free trial of Parallels RAS to reap the benefits of load balancing!

References:

https://www.nginx.com/learn/load-balancing/

https://www.parallels.com/products/ras/capabilities/load-balancing/