Why tech leaders should track service level objectives (SLOs) in load testing campaigns

When Canal+ needed to guarantee its streaming platform could handle millions of concurrent viewers during a major live football broadcast, the team didn't simply run a load test and hope for the best. They ran progressive, iterative load campaigns against explicit performance targets, identified and resolved bottlenecks in caching and licensing APIs, and optimised machine sizing before a single viewer tuned in. The result: zero incidents during the broadcast. Not "fewer incidents than last time...