多选题

Which statements are right for COW, c...

Question

Which statements are right for COW, copy-on-right?

A. The copy operation is deferred to the first write.

B. Mainly used in cache system.

C. If a resource is duplicated but not modified, it is not necessary to create a new resource.

D. It is possible to significantly reduce the resource consumption of unmodified copies, while adding a small overhead to resource-modifying operations.