System Design Interview Alex Wu Pdf Github [2021] Direct

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| Phase | Time | Action (From the Book) | | :--- | :--- | :--- | | | 5 min | Ask: DAU? Read/Write ratio? Photos or text? | | 2. Estimation | 5 min | Storage (3-5-7 rule) + QPS calculation. | | 3. Data Model | 5 min | Draw DB schema. SQL for ACID, NoSQL for massive scale. | | 4. High Level | 10 min | Client -> LB -> Web Servers -> Cache -> DB. | | 5. Deep Dive | 15 min | Pick ONE component. (e.g., "Let's discuss Database Sharding like Alex Xu does in Ch. 5"). | | 6. Bottlenecks | 5 min | Single point of failure? Replication lag? | * Packages