問題文
A test team asks for a point-in-time copy of a 2 TB Oracle ACFS file system that can be written to. Which statement describes what a snapshot provides?
選択肢
- A snapshot can be read-only or read-write, it is space efficient because the previous content of a file extent is copied only when that extent is changed, and it is created inside the file system of the cluster itself.
- A snapshot can be read-only or read-write, it occupies as much space as the file system it was taken from, and it is created in a separate file system so that the load of the test work does not touch the original storage at all.
- A snapshot is always read-only, it occupies as much space as the file system of the cluster it was taken from because every extent is copied at creation time, and it is created in a separate disk group that needs to be prepared for it in advance.
- A snapshot is always read-only, and it is space efficient, and a copy that can be written to needs to be obtained by duplicating the whole of that file system in another place.