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1885h ago · 2 min read · Organizing data to reduce redundancy Day 125 of 149 👉 Full deep-dive with code examples The Address Book Analogy Bad address book: "John Smith, 123 Main St, Sydney NSW 2000" "John Smith, 123 Main St, Sydney NSW 2000" (repeated!) What if John moves...
Join discussion1d ago · 2 min read · Pick two: consistency, availability, partition tolerance Day 124 of 149 👉 Full deep-dive with code examples The Three Wishes Analogy A genie says: "Pick any TWO wishes, but not all three" Wish 1: Fastest car Wish 2: Cheapest car Wish 3: Most relia...
Join discussion2d ago · 2 min read · Guarantees for data reliability Day 123 of 149 👉 Full deep-dive with code examples The Bank Transfer Analogy Transferring money from Account A to B: Subtract the amount from A Add the amount to B What if the power goes out between steps? A lost ...
Join discussion3d ago · 2 min read · Copying data to multiple servers Day 122 of 149 👉 Full deep-dive with code examples The Backup Copy Analogy Important documents: One copy at home One copy at the bank One copy at your lawyer's If your house burns down, you still have copies! Data...
Join discussion4d ago · 2 min read · Splitting data across servers Day 121 of 149 👉 Full deep-dive with code examples The Library Card Catalog Analogy One huge card catalog is hard to use: Long lines at one catalog If it breaks, no one can find books Split by letters: A-F catalog i...
Join discussion5d ago · 1 min read · Objects to database rows translator Day 120 of 149 👉 Full deep-dive with code examples The Translator Analogy In a foreign country, a translator converts between languages. ORM translates between your code and the database. You work with objects. O...
Join discussion6d ago · 2 min read · Preventing cascade failures Day 119 of 149 👉 Full deep-dive with code examples The Electrical Circuit Breaker Analogy When too much electricity flows: The circuit breaker trips Stops electricity to prevent fire You fix the problem Then reset the b...
Join discussionApr 22 · 2 min read · Single entry point for services Day 118 of 149 👉 Full deep-dive with code examples The Hotel Concierge Analogy At a hotel, you don't go directly to housekeeping, the kitchen, or maintenance: You talk to the concierge They route your request to the...
Join discussionApr 21 · 2 min read · Store events, not current state Day 117 of 149 👉 Full deep-dive with code examples The Bank Statement Analogy Your bank doesn't just show your balance: It keeps every transaction ever Deposit $100, withdraw $20, transfer $50... You can see exactly...
Join discussionApr 21 · 2 min read · Separate read and write models Day 116 of 149 👉 Full deep-dive with code examples The Library Analogy Imagine a library: Reading books → Sit in reading room, browse catalog Adding new books → Different process, involves cataloging, labeling Readi...
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