September 2018
Intermediate to advanced
764 pages
20h 6m
English
Content preview from Building Enterprise JavaScript Applications
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Load balancing versus failover
Conventionally, there are two methods to route requests to replicated components:
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Load balancing: A load balancer sits in-between the client and the server instances, intercepting the requests and distributing them among all instances:
The way requests are distributed depends on the load balancing algorithm used. Apart from "random" selection, the simplest algorithm is the round-robin algorithm. This is where requests are sequentially routed to each instance in order. For example, if there are two backend servers, A and B, the first request will be routed to A, the second to B, the third back to A, the fourth ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.