Cache writes must eventually be propagated to the backing store. The timing for this is governed by the write policy. The two primary write policies are: Write-through: Writes are performed synchronously to both the cache and the backing store. Write-back: Initially, writing is done only to the cache. The write to the backing store is postponed until the modified content is about to be replaced by another cache block.
Cache writes must eventually be propagated to the backing store The timing for this is governed by the write policy The two primary write policies are Write-through Writes are performed synchronously to both the cache and the backing store Write-back Initially writing is done only to the cache The write to the backing store is postponed until the modified content is about to be replaced by another cache block