ADevGuide Tag: Scalability
All the articles with the tag "Scalability".
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What Is a Single Point of Failure (SPOF)?
Series: System Design Foundations
Learn what a single point of failure (SPOF) is, why it brings down entire systems, and how to eliminate it with redundancy and failover.
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What Is High Availability? A Beginner's Guide
Series: System Design Foundations
Learn what high availability means, how redundancy and failover work, and why uptime percentages like 99.9% matter for modern systems.
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In-Memory Cache vs Distributed Cache Explained
Series: System Design Foundations
Compare in-memory cache vs distributed cache: speed, scalability, consistency, and when to choose Redis over a local cache.
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What Is Caching? Why It Improves Performance
Series: System Design Foundations
What is caching? Learn how caches work, cache hits/misses, TTL, and common strategies (browser, CDN, Redis) to speed up apps.
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What Are Sticky Sessions in Load Balancing? (Session Affinity)
Series: System Design Foundations
Sticky sessions (session affinity) keep a user on the same backend. Learn how they work, when to use them, and safer stateless alternatives.
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Horizontal vs Vertical Scaling Explained (Scale Out vs Up)
Series: System Design Foundations
Horizontal vs vertical scaling explained: scale up vs scale out, trade-offs for cost, availability, and performance, plus real examples to choose confidently.
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What Is Load Balancing and How It Works
Series: System Design Foundations
What is load balancing? Learn how load balancers work, key algorithms, health checks, and Layer 4 vs Layer 7 trade-offs.
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What Is Scalability? A Beginner's Guide for Developers
Series: System Design Foundations
Learn what scalability means in software development, why it matters, and how vertical vs horizontal scaling work - with real-world examples.
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What Is Hashing? Why It Matters in Modern Software Architecture
Series: Database Scalability Series
Learn hashing in software architecture: data distribution, cache keys, security, consistency, and performance trade-offs used in real production systems.
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System Design Interview: Ultimate Cheatsheet to Crack Any Round
Series: CheatSheets
Master your next system design interview with this practical cheatsheet covering requirements, architecture, scaling math, trade-offs, security, and follow-ups.