GCP: How to measure latency between VMs?

Example: speed of light in fiber, which is roughly 202562 km/s or or 125866 miles/s. VM 1: e1-vm (Berkeley County, South Carolina) VM 2: eu1-vm (St. Ghislain, Belgium) Distance as the crow flies: 6837.20km Ideal latency: 6837.20 km / 202562 km/s * 1000 ms/s * 2 = 67.51 ms Observed latency: 93.40 ms (minimum counts) https://www.daftlogic.com/projects-google-maps-distance-calculator.htm https://cloud.google.com/compute/docs/regions-zones/regions-zones#available

Top ELB health and performance metrics

Part 1 – https://www.datadoghq.com/blog/top-elb-health-and-performance-metrics Request count Surge queue length and spillover count ELB 5xx errors Backend instances health status Backend latency Part 2 – https://www.datadoghq.com/blog/how-to-collect-aws-elb-metrics Part 3 – https://www.datadoghq.com/blog/monitor-elb-performance-with-datadog