Write-Through Cache

What Does Write-Through Cache Mean?

Write-through cache is a caching technique in which data is simultaneously copied to higher level caches, backing storage or memory. It is common in processor architectures that perform a write operation on cache and backing stores at the same time.


Techopedia Explains Write-Through Cache

Write-through cache helps increase read performance in memory access methods because the requested data is already present in the cache and memory. In each write-through operation, data that is brought into the cache is also written into the backing store, which is the primary memory (RAM, in most cases).

Write-through cache also helps with data recovery, as the data in operation is written to both cache and memory. It is nearly impossible to restore data from cache. However, to an extent, modern operating systems (OS) have the ability to save an instance of running memory.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…