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Fallbacks and Provider Failover

You are on an availability commitment and your model provider is not under your control. Failover means deciding in advance what a degraded answer looks like, because the alternative is that an outage upstream becomes an outage in the customer's workflow, and they signed the contract with you.

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LESSONS THAT TEACH THIS

Hard DeploymentsDecide now what the system does on the day the model is unavailable30 min→

PRACTICE THIS IN REAL QUESTIONS

SQL & Data EngineeringFind users who logged in on 3 or more consecutive days (gaps-and-islands).→SQL & Data EngineeringSessionize a raw event stream in SQL: a gap of more than 30 minutes starts a new session.→RAG & Agent System DesignTake a RAG POC from 50 docs in a notebook to 5M docs, 2k QPS, and a 99.9% SLA→System Design & Production EngineeringDesign multi-region failover for an LLM product, including the day your model provider goes down.→System Design & Production EngineeringYour pilot wowed the customer. Take it to production: 99.9% SLA, real users, their security team watching. Design the path.→ML Infrastructure & GPUsServe a 400B-class MoE under a 200ms p99 inter-token SLA. How do you lay it out?→