midCaching
Write-Back (Write-Behind) vs. Write-Around Caching.
Updated Apr 28, 2026
Short answer
Write-back writes to cache first and updates DB later; Write-around writes directly to DB and bypasses the cache.
Deep explanation
Intermediate caching involves choosing strategies that balance speed with data accuracy. Write-back writes to cache first and updates DB later; Write-around writes directly to DB and bypasses the cache.
Real-world example
Using Redis to store session data across a cluster of web servers.
Common mistakes
- Using Write-Back caching for critical financial data without a robust safety net for data loss.
Follow-up questions
- What is a 304 HTTP code?