Slack experienced a significant user outage in June 2021 due to a "gray failure" in a single AWS availability zone, where intermittent network issues caused inconsistent system behavior. This event, which nearly exceeded their annual SLA, prompted an 18-month infrastructure overhaul. The project culminated in the development of a "big red button" capable of safely evacuating an entire data center in under five minutes, enhancing their fault isolation capabilities. AI
IMPACT This infrastructure improvement enhances service reliability, indirectly supporting AI workloads that depend on stable cloud services.
RANK_REASON The article describes a specific technical feature developed by a company to solve an internal operational problem, which is a type of product/tool.
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