Link to home
Start Free TrialLog in
Avatar of jskfan
jskfanFlag for Cyprus

asked on

understanding -delta.vmdk file

understanding -delta.vmdk file

If I understand single -delta.vmdk file cannot exceed the size of the original -flat.vmdk file.

So, in the case  we leave a VM running on a snapshot, then  the -delta.vmdk file will keep growing till it reaches the size of -flat.vmdk file, then what will happen ?

Thank you
Avatar of Bastiaan
Bastiaan
Flag of Netherlands image

Eventually it will consume all space on your volume and it will crash resulting in data loss.

ASKER CERTIFIED SOLUTION
Avatar of Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of jskfan

ASKER

Andrew,

so if we take snapshot of small size disk, then take a snapshot of it , probably can fail quickly if we do not delete the Snapshot, because the snapshot  size can easily reach the size of the original disk...

What do you use to monitor and alert you about the size of the snapshot to avoid the crash...?
so if we take snapshot of small size disk, then take a snapshot of it , probably can fail quickly if we do not delete the Snapshot, because the snapshot  size can easily reach the size of the original disk...

What do you use to monitor and alert you about the size of the snapshot to avoid the crash...?

WRONG, very WRONG.

If you are running on a snapshot, you run the risk of a corrupt VM.

Search for Snapshots on EE!
Avatar of jskfan

ASKER

I have read about Snapshots Article you wrote it was a very good article.
 these are kind of specific questions :

Many VMs can be  kept inadvertently running on snapshot... especially snapshots created by Backups that have not been checked.

so if you have a small VM, that runs on a snapshot, when the size of snapshot (Delta-vmdk) file reaches the size of Flat-vmdk file, then the VM crashes.
what is the Alerting tool you use , to be proactive on that ?

Thanks
scripts
vCenter Alerts
Snapshot Watcher commercial
Daily VMware Admin

it’s part of our Operators 1hour 100 daily checks at shift change!
Avatar of jskfan

ASKER

Thank you Guys