Redis Caching: Patterns for Real Workloads
Redis caching in practice: cache-aside with a TTL on every write, the redis TTL strategy, and the stampede,…
Tag
system-design
58 articles
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Cache Failure Modes: Stampede, Avalanche, and Penetration
The three ways caches fail when it matters: the cache stampede on an expired key, cache avalanche from…
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Distributed Caching: Architecture and Invalidation Across Nodes
Distributed caching beyond one node: consistent-hash routing, cache tiers, hot keys, cross-node invalidation, and the redis vs memcached…
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Caching in System Design: Patterns, Eviction, and Hit Ratio
Cache-aside vs read-through, write-through vs write-back, LRU eviction, and the hit-ratio math that decides whether a cache pays…
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L4 vs L7 Load Balancing: Where the Balancer Looks
L4 vs L7 load balancing compared: the layer 4 load balancer's connection-level speed, the layer 7 load balancer's…
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Long Polling vs Server-Sent Events: Choosing a Push Strategy
Long polling vs SSE compared: how server sent events work, where websockets fit, sse vs polling costs, and…
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WebSockets in System Design: When You Need a Persistent Connection
What are websockets: the websocket vs http comparison, the websocket connection lifecycle in six steps, and scaling websocket…
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Rate Limiting in System Design: Algorithms and Distributed Enforcement
The rate limiting algorithms that matter (token bucket, leaky bucket, sliding window) how distributed enforcement works across a…
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API Gateway in System Design: The Front Door of Microservices
What an API gateway does (routing, authentication, rate limits, transformation) how it differs from a reverse proxy and…
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How a CDN Works: Edge Caching, TTLs, and Cache Hit Ratio
How a CDN serves content from edge servers near users; cache hits, origin fetches, TTLs, cache hit ratio,…
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Reverse Proxy Explained: The Server in Front of Your Servers
What a reverse proxy is, what it does (TLS termination, routing, security) how it differs from a forward…
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Load Balancing in System Design: Types, Algorithms, and Health Checks
What a load balancer does, how L4 and L7 balancing differ, which algorithm to pick (round robin, least…
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Client-Server Architecture: The Model Every System Design Builds On
Client server architecture explained: how the client server model works, stateless vs stateful servers, and the request response…
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The CAP Theorem and Consistency Models, Explained Practically
CAP says that during a network partition, a distributed system must choose between consistency and availability. Precise definitions,…