What load balancing algorithms do you know?

Round Robin: Requests are distributed sequentially among available servers. Simple and effective, but does not consider server load.
Weighted Round Robin: Similar to Round Robin but considers assigned weights to servers. Servers with higher weights receive more requests. Allows prioritizing more powerful servers.
Least Connection: Requests are sent to the server with the fewest active connections. Effective for long-lived connections but may not accurately reflect actual load.
Least Response Time: Requests are sent to the server with the fastest response time. Considers server performance but requires monitoring and can be unstable if response times fluctuate significantly.
IP Hash: Requests from the same client (determined by IP address) are always directed to the same server. Ensures session stickiness but can lead to uneven load distribution if many requests come from a single IP.
Least Bandwidth: Requests are sent to the server using the least bandwidth. Suitable when the main resource is bandwidth.
URL Hashing: Requests are distributed based on the hash of the URL. Ensures requests for the same resource go to the same server.

The choice of algorithm depends on the specific requirements of the application and traffic characteristics.

Algorithm	Advantages	Disadvantages
Round Robin	Simple to implement, predictable	Does not consider server load
Weighted Round Robin	Considers server capacity, flexible	Requires correct weight assignment
Least Connection	Effective for long-lived connections	Does not always reflect actual load
Least Response Time	Considers server performance	Requires monitoring, can be unstable
IP Hash	Ensures session stickiness	Can lead to uneven load
Least Bandwidth	Suitable for limited bandwidth	Does not consider other resources
URL Hashing	Sends requests to the same resource on one server	Less effective for dynamic content