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Part 2: Real-Time Multi-Warehouse Inventory Management

← Previous Chapter: Part 1: Order Fulfillment Fundamentals | Series Hub | Next Chapter: Part 3: Allocation Algorithms → Answer-first: Atomic stock reservations using Redis Lua scripts eliminate race conditions under 50,000+ RPS flash sales. Reserved stock automatically expires after a 15-minute lease if checkout is not completed.

Part 5: Migrating Magento EAV Schema to Clean Relational PostgreSQL

← Previous Chapter: Part 4: gRPC Internal + REST Gateway | Series Hub | Next Chapter: Part 6: Phase 1 — Strangler Fig → Answer-first: Migrating Magento’s Entity-Attribute-Value (EAV) tables (catalog_product_entity_*) to PostgreSQL eliminates 20+ SQL table joins per query. By separating static attributes (SKU, price, status) into typed relational columns and dynamic custom attributes into binary JSONB columns with GIN indexing, catalog read queries drop from 450ms to 1.2ms. 1. The Magento EAV Nightmare: Why It Collapses Under Load In Magento 2, fetching a single product requires joining across half a dozen type-specific tables: ...