VMware Snapshot in a nutshell
I n VMware, snapshot refers to the copy of the virtual machine disk file (VMDK) at a certain point in time. In addition to the VMDK file, it copies the content in vRAM and VM settings at that point of time. Snapshot creation When you create a snapshot, the disk which was writable becomes read-only and a new delta file will be created.This delta file will contain all changes (delta) to the original disk files.When you create multiple snapshots, new delta files are created and the previous delta files become read-only. With multiple snapshots each delta file can potentially grow as large as the original disk file.