How-TO use load balancer
Load Balancer -- Glossary explanation in summary from Grokking the system design interview
Load balancer is another critical component in distributed system. it helps to spread the traffic across a cluster of servers to improve responsiveness and availability of applications, websites or databases. LB also tracks of the status of all the resources while distributing requests. If a server is not available to take new requests, or is not responding or has elevated error rate, the load balance will not pass on requests to that server.
