VMDK and Storage Usage

sara2000
sara2000 used Ask the Experts™
on
Experts out there, I have a question on VMware datastore, hope someone will shed light on it. VSphere client shows a value for "storage usage" is 40 GB and the vmdk file size is less than 40GB. My understanding is that storage usage is included vmdk with some other files (vms,swap, etc). Is there any equation for that extra space usage? like 5% overhead etc.
Comment
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
There is no equation

But from experience we’ve always used a factor of 20% -30%

E.g make sure 20%-30% is free for files swap and snapshots

Author

Commented:
I forgot to mention that I am trying to work out the space for backup, i guess the backup software will backup vmdk plus other files.
this case I need space of vmdk and other files?
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
You also need to factor compression so that’s not so easy

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start Today