Overview
This post summarizes cache write methods.
Write-Through
A method where data is written to the cache and main memory simultaneously. Write operations occur on both the cache and main memory. This approach makes it easier to maintain data consistency but may introduce write latency.
Write-Back
A method where data is first written to the cache and retained there until it is eventually written to main memory. Write operations occur only on the cache, and writes to main memory happen as needed. This approach can hide write latency but requires measures to maintain data consistency.
Write-Around
A method where data is written directly to main memory, bypassing the cache. This reduces the write load on the cache. The cache is used only for read operations in this pattern.