Write Policy

The write policy dictates how information is written into the cache and memory.

Hit Policy

• Write Through - value is written to both the cache and the memory
• Write Back - value is written only to the cache. However, when the block is evicted it is written to the memory.

Miss Policy

• No Write Allocate - value is written only into the memory
• Write Allocate - the block is brought into the cache after writing to the memory

We commonly use either write through with no write allocate, or write back with write allocate