Types of caching: every layer from browser to database
Browser, CDN, reverse proxy, app memory, Redis and database: what each caching layer stores, who shares it, and how one results-day request moves through them.
#cdn
7 articles tagged #cdn
Articles
How to scale a video learning platform
From transcoding and CDNs to live classes and test-day spikes: an engineer's guide to scaling video learning for thousands of students at once.
Cache-Control headers explained: no-cache, no-store, max-age
What each Cache-Control directive does, no-cache vs no-store, ETags and revalidation, and ready-to-use headers for static files, HTML, APIs and HLS video.
CDN caching: how edge caches work, with Cloudflare rules
How edge caches decide hits and misses, what Cloudflare caches by default, cache rules for HTML, APIs and HLS, measuring hit ratio, and purging safely.
Cache invalidation and TTLs: strategies that work
TTLs, event-based deletes and versioned keys: choosing TTLs per data type, purging CDNs, avoiding stale reads after writes, and why eviction isn't invalidation.
Multi-CDN and CDN failover for video platforms
Why one CDN is a single point of failure on exam and launch days, how DNS, player-side and content-steering failover compare, and what must match across CDNs.
Signed URLs and hotlink protection for video, explained
How signed links and hotlink protection get bypassed: links shared before expiry, valid sessions, leaked secrets, public storage and faked Referer headers.
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