Daily Term: Write-Back Cache

Write-Back Cache

Write-Back Cache, also known as write-behind, is a caching strategy where data is written to the cache first and asynchronously written to the underlying storage later. For example, a system might write user updates to a cache immediately and sync them to a database in the background. This improves write performance by reducing latency, but it risks data loss if the cache fails before the data is persisted to storage.

Date: 2025-07-25

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Previous Terms

Write-Through Cache

A caching strategy that writes to cache and storage simultaneously.

Date: 2025-07-24

Cache Invalidation

Removing outdated data from a cache.

Date: 2025-07-23