ELS: a latency-based load balancer, part 2

What to Measure? In part 1, we already mentioned a few metrics that should be considered by the load balancer. Success latency ℓ and success rate s of each machine. Number of outstanding requests q between the load balancer and each machine. These are the requests that have been sent out but haven’t received a […]


ELS: latency based load balancer, part 1

Load Balancing Most Spotify clients connect to our back-end via accesspoint which forwards client requests to other servers. In the picture below, the accesspoint has a choice of sending each metadataproxy request to one of 4 metadataproxy machines on behalf of the end user. The client should get a quick reply from our servers, so if one machine becomes too slow, it […]