Hi, Does we need to put router behind load balance like HAproxy only for HA purpose or there is some load balancing purpose too?

routers are basically just reverse proxies so they can handle quite a lot of load. usually it's only necessary to have multiple of them for HA purposes

Thanks, but what about Druid Brokers? According to the official documentation: "Druid Brokers can be scaled out, and all running servers will be active and queryable. We recommend placing them behind a load balancer." Does this mean that the Druid Router acts as the load balancer for Druid Brokers? And should the typical architecture consist of: A VIP (Virtual IP) load balancer for HA (High Availability) between Druid Routers At least two Druid Routers One or more Druid Brokers ... other components

typically the Router is the load balancer for Brokers

Thanks a lot!