Caching strategies

• cache-aside

  • Look for entry in cache, resulting in a cache miss

  • Load entry from the database

  • Add entry to cache

  • Return entry

• Write-through

  • Application adds/updates entry in cache

  • Cache synchronously writes entry to data store

  • Return

• Write-behind (write-back)

  • Add/update entry in cache

  • Asynchronously write entry to the data store, improving write performance

• Refresh-ahead