System Design -- Load Balancing | How Load Balancers work.
Features of Load Balancer:
* Distribute load/requests across multiple resources/servers.
* Keep track of status of all resources while distributing requests. If a server is down, it stops sending traffic to that server. [depending on activeness of the server]
* Ease of use in adding/removing servers in network based on demand.
Algorithms used for Load Balancing:
1. Round Robin
2. Least Connections
3. Least Response Time
4. IP Hash
5. URL Hash
Where can we use Load Balancers?
User Requests -- [Load Balancer] -- Web Server
Web Server -- [Load Balancer] -- Backend Server
Internal Server -- [Load Balancer] -- Databases
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System Design: Load Balancing | How Load Balancers work
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