Every Caching Strategy Explained in 5 Minutes

Caching Strategies Overview:

1. Cache-Aside: App checks cache first; on miss, fetches from DB and caches it. Best for read-heavy workloads and simple logic.

2. Read-Through: App only interacts with cache; cache fetches from DB on miss. Useful for abstracting data logic.

3. Write-Through: Writes to both cache and DB for consistency. Slower writes but no stale data.

4. Write-Behind: Writes only to cache, async writes to DB later. Fast, good for high-frequency updates, but risk of data loss.

5. Write-Around: Writes directly to DB; cache populated on reads. Efficient for write-heavy tasks with low read immediacy.

Choosing Strategy: Depends on read/write speed needs, consistency, and complexity.

Example Use Case: Real-time leaderboard favors Write-Behind for speed, high volume, and acceptable eventual consistency.

Why Not Others: Options like Write-Around, Cache-Aside, or Write-Through sacrifice speed for consistency, unsuitable for real-time needs.

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