Chapter 9 Transaction Management and Concurrency Control - SlideServe
Chapter 9 Transaction Management and Concurrency Control - SlideS…
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codeN’ on Instagram: "Understand System Design with my small stories and follow tor more! Optimistic locking assumes conflicts are rare. Transactions proceed without taking locks while reading and modifying data. Before committing, each transaction validates that the data it read hasn’t been changed by someone else. If validation fails, the transaction aborts (retries or fails). Typical implementations use a version number, timestamp, or compare-and-swap (CAS). #dsa #reelsinstagram #systemdesign
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Fullstack Gada on Instagram: "Optimistic vs Pessimistic Locking 🔒 👉 Pessimistic Locking: Lock first, then work – safe but slow. 👉 Optimistic Locking: Work first, verify later – fast but risky. #sql #database #systemdesign #sqldeveloper #optimisticlocking #pessimisticlocking #softwareengineering #concurrencycontrol #databasemurah #sqldatabase #dataanalysis #techreels #devtips #jethalal #bhide #jethatech #fullstackgada"
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Deshansh Garg on Instagram: "Interview Approach: Think race condition on shared resource (inventory) → multiple updates at the same time. Answer Pointers: Problem: Without synchronization, two users may buy the same last item → overselling. Fix Approaches: 1. Database Constraints + Row Lock→ Decrement stock using `UPDATE inventory SET count = count-1 WHERE count > 0`. 2. Optimistic Concurrency Control → Keep the stock version, retry if someone else is already updated. 3. Atomic Operations in Cac
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