Thin provisioned disks get larger as data is written to them. Here’s how and why. Thin provisioning is a great tool, but it may not work exactly like you think. You also need to know when it may cause problems for you.

Oh no, the datastore has run out of space!

How did this happen and what can I do to fix it?

Better yet how do I avoid running out of space?

The dangers of operating VMware snapshots, along with the reasons why you should use snapshots