34. VMware Administartion v6.7 - Virtual Machine Snapshots

A VMware snapshot is a copy of the virtual machine's disk file (VMDK) at a given point in time. Snapshots provide a changelog for the virtual disk and are used to restore a VM to a particular point in time when a failure or system error occurs. Snapshots alone do not provide backup.
Any data that was writable on a VM becomes read-only when the snapshot is taken. VMware administrators can take multiple snapshots of a VM to create multiple possible point-in-time restore points. When a VM reverts to a snapshot, current disk and memory states are deleted and the snapshot becomes the new parent snapshot for that VM. The snapshot file cannot exceed the size of the original disk file, and it requires some overhead disk space. Snapshots will grow rapidly with high disk-write activity volume. Most snapshots are deleted within an hour and VMware recommends deleting snapshots within 24 hours.
Snapshot file formats include *--delta.vmdk file, *.vmsd file and *.vmsn file. Administrators create snapshots in VMware vSphere's Snapshot Manager or with the VMware-cmd command-line utility. Deleting, or committing, snapshots merges all of the delta files into the VMDK. If delta files remain in the VM's directory after deletion, the snapshot did not delete properly.
-----------------------------------------------------------
G E T M O R E C O N T E N T
----------------------------------------------------------
www.nakivo.com/blog/vm-snapsh...
searchvmware.techtarget.com/d...
www.mavrickcloud.com/blogs/
github.com/maverick-cloud/
--------------------------------------------
S O C I A L M E D I A
--------------------------------------------
Facebook: / maverick.cloud1
Subscribe: / maverickcloud
--------------------------------------------
CONTACT US
--------------------------------------------
Email: [e-mail]
Call: [phone]
Join WhatsApp Group: chat.whatsapp.com/LI6LLfhX3En...
#vSpherev67
#VMSnapshot
#VMware67FullTutorial

[@mohammedasifkhanp5032]

Mr. Srinivas,
yes you are the very good tutor with lots of patience .. Kindly keep continuing your efforts and come up with more videos like this.. THANK YOU.🙏

[@maverickcloud]

Thanks!

[@abdurahmanfaisal6835]

Sir, In our office usually I take snapshot every weekend and keep two week's snapshots(current week and previous weeks). Unfortunately there was a ransomewere attack on our network on friday night which I didn't know and Saturday morning I took the snapshot. On Monday morning when I checked all the VM's were encrypted and luckily I had two snapshot's (one previous week's and one I took after the attack). Then I reverted back to Saturday's snapshot it was showing the same encrypted VM. So I again reverted back to previous weeks snapshot and I was able to bring back the VMs. This attack happened because our firewall's license was expired later we renewed the license.

[@Ram-vg5dt]

If patching not work..we deleted snapshot...my doubt is..
1.what about customer work data, during snapshot period..

[@abdurahmanfaisal6835]

Sir , Here two scenarios
Scenario 1 :- Take the snapshot-> Do patching -> Ask customer to verify, wait for 2 days, if green signal -> Consolidate and delete snapshot
Scenario 2 :- Take the snapshot-> Do patching -> Ask customer to verify, wait for 1 hour, if they are unable to run application -> Restore Snapshot and delete
Am I correct ?

[@maverickcloud]

Correct!

[@abdurahmanfaisal6835]

@@maverickcloud Thank you Sir !

[@vadlavamsi9438]

Hi Sir,
I have a doubt, if we took a snapshot, will the new delta disk will grow on corresponding datastore??

[@vadlavamsi9438]

If yes, because of delta disks growing on datastore, do we need keep some storage as buffer at datastore??

[@vadlavamsi9438]

I understand the same by your explaining saying we need to have at least 5% to 10% of free space in datastore.

[@vadlavamsi9438]

In case our delta disks are grown more than the flat VMDK, how consolidation will takes place??
If flat VMDK is full it must override the existing data otherwise the delta disk data will simply commit to the empty space left in flat VMDK.

[@vadlavamsi9438]

Please help me, I found many videos but no one explaining like you by creating doubts.

[@giulianosolinas2725]

What a confused explanation

[@maverickcloud]

Thank you for your feedback !!! will improve !!