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write-through cache

by Sam ChenFebruary 15, 2017

In a write-through cache, writes are confirmed only after the data has been written to both the cache and the permanent storage behind it.

As writing to both the cache and permanent storage is slower than just writing to the cache itself, the write-through cache is significantly slower in comparison to the write-back cache. However, as data is written to both the cache and permanent storage, data is secure even in the event of sudden power loss.

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Sam Chen
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