I have created about ~20 minutes screencast about VNX Snapshots and Snapshot Mount Points.
Instead of a lot of theory explaination (which you can find for example here EMC VNX – Snapshots) I’m focusing on showing the basic functionality on two examples.
Example 1. I simulate a data loss from the host side, as an example new version of Software XYZ was released and instead of using the existing database file with your crucial data, it creates a new one, overwriting your existing data.
Example 2. This time you are smarter and you have a test environment on which you would like to test first the newer release of your software. But you need a copy, or image of your production data to make sure the test is valid. How to do that using Snapshots and SMPs technologies?