How Comet Achieved Zero Downtime
Blog post from Comet
In an effort to minimize production downtime and enhance system reliability, Comet Cloud, a tool utilized by data scientists for tracking model training runs, undertook a comprehensive infrastructure overhaul in 2023. The engineering team identified three primary causes of downtime: infrastructure, application issues, and human error, and addressed each aspect meticulously. They transitioned from EC2 to Kubernetes, implementing a phased migration strategy that included traffic splitting and header-based routing to ensure a seamless transition. To manage high data traffic, the team adopted the Token Bucket algorithm to prevent network congestion and resource exhaustion. To address human error, they mandated approvals for changes to the production environment to promote a culture of stability and reliability. These efforts resulted in Comet Cloud exceeding its goal of 99.97% uptime, achieving 100% uptime in Q4 2023, thereby significantly bolstering the service's dependability for its over 100,000 end users across advanced ML teams and industries.
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