COW(copy-on-write)


like fork(do not need to copy code and data) we do resource sharing efficiently
image copy on write time, parent and child processes to initially share the same
If either process modifies a shared page, only then is the page copied.
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F024bcd14-9529-4600-bd90-9c52a217c55e%2FUntitled.png?table=block&id=10970c8f-03c3-4373-9c16-b2c1748a6a49&cache=v2)