Caching & Alternative Stores

Keeping a second copy fast, and the genuinely hard half of knowing when to drop it.

3 concepts · 115 minutes

• Caching with RedisAn in-memory store used as cache, session bag, lock, counter, and queue.
• SQL vs NoSQLAccess patterns decide the store — not fashion, and not scale you don't have.
• Cache InvalidationTTLs, tags, stale-while-revalidate — the genuinely hard half of caching.