When we introduce a cache into the architecture, synchronization between the cache and the database becomes inevitable.

Let’s look at 5 common strategies for how we keep the data in sync.

Read Strategies

• Cache aside
• Read through

Write Strategies

• Write around
• Write back
• Write through

The caching strategies are often used in combination. For example, write-around is often used together with cache-aside to make sure the cache is up-to-date.