Cache-Aside

Load data on demand into a cache from a data store, while keeping the consistency between the data held in the cache and in the data store. 

When to use this pattern?  

• A cache doesn’t provide native read-through, and write-through operations  

• Resource demand is unpredictable 

When NOT to use this pattern?  

• When the cached data set is static  

• For caching session state information in a web application hosted in a web farm 

Considerations  

• Time To Live (TTL)  

• Evicting data  

• Priming the cache  

• Consistency  

• Local (in-memory) caching