Solved

When to take a snapshot of Vcenter VM

Posted on 2014-02-02
9
3,044 Views
Last Modified: 2014-02-17
Out Vcenter is a virtual machine, I would like to know in which scenario should I take a snapshot of it:

- when updating windows OS (I believe I should take snapshot)
-when upgrading to a new Build ,example from 5.1.0 to 5.1.2
-when upgrading from 5.1.2 to 5.5

Assuming Upgrade is either uninstalling the old venter version and reinstalling new version.
OR
upgrading to a new version without uninstalling the old version

Thanks
0
Comment
Question by:jskfan
  • 4
  • 4
9 Comments
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 39827625
We are not fans of Snapshots, at ALL, so we would say NEVER!

By Taking a Snapshot, you are creating a delta or differencing disk, where all the changes you make to the OS, are created, performance of the VM gets worse running on a snapshot.

then, when you are finished, you Delete the Snapshot, which can take time, to merge the changes, depending on how long, and how large the snapshot is.

The danger is the snapshot does not merge, datastore space runs out of storage, and the merge process, causes poor VM performance.

AND, before you make ANY CHANGES to a VM in Production, it's GOOD Practice, to have a FULL BACKUP, not a Snapshot.

SO, I would recommend you Take and have FULL BACKUPS of ANY VM, before you make any changes to the VM.

HOW TO: VMware Snapshots :- Be Patient

You can also use the CLONE operation (as a backup!)
0
 

Author Comment

by:jskfan
ID: 39828192
If I understand , snapshots will be good just when you do Guest OS updates, not Vmware related updates?
for instance if I need to update Virtual Machine virtual hardware or VM Tools, or upgrade Vcenter build, or uninstall /reinstall Vcenter Application, the snapshot will not be helpful in this case.?
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 39828214
We are not fans of Snapshots, at ALL, so we would say NEVER!

Take a FULL Backup of the VM before any change.

You CANNOT role Backup some VMs.

e.g. Exchange Mail servers, SQL Servers, Active  Directory Domain Controllers.

Do not use Snapshots, you will regret it!
0
U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

 

Author Comment

by:jskfan
ID: 39828546
I am not Fan of snapshots either,,
however I do not know the purpose of Vmware having Snapshot Manager there…
in which case it is recommended to use Snapshot Manager to take a snapshot?
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 375 total points
ID: 39828553
If you want to use the Snapshot feature, go ahead, but you would be well advised to make sure you have FULL Backups before making any changes to Production Machines.

VMware have introduced Snapshots, so Backups can work, and it's a feature from VMware Workstation, more often than not Admins do not know how to use them, and get into difficulty.

and Post questions here on EE.

To use snapshot, select Take Snapshot before you do you changes.
0
 

Author Comment

by:jskfan
ID: 39828618
Andrew..
I am just trying to understand why Vmware came up with snapshots. they got to have a purpose when to use them
0
 
LVL 119
ID: 39828939
You can use them anytime, but the responsibility is on the Administrator, when to use them, and what to use them for.

This is the issue Administrators, do not understand, the issues, they can cause, which I have listed.

e.g. if you patch a Domain Controller, and it goes wrong, would you Revert a Snapshot? (e.g. rollback all the changes in the Domain Controller, e.g. go back it time?)
0
 
LVL 19

Accepted Solution

by:
compdigit44 earned 125 total points
ID: 39831051
One side note,  like Hancock has mention snapshots are good but with anything in life must be used with moderation. Here is vmware best practices guides for snapshots..

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1025279


Also when upgrading vcenter the upgrade makes schema updates which affects your DB as well.
0
 

Author Closing Comment

by:jskfan
ID: 39865757
Thank you
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Veeam Backup & Replication has added a new integration – Veeam Backup for Microsoft Office 365.  In this blog, we will discuss how you can benefit from Office 365 email backup with the Veeam’s new product and try to shed some light on the needs and …
In this article we will learn how to backup a VMware farm using Nakivo Backup & Replication. In this tutorial we will install the software on a Windows 2012 R2 Server.
Teach the user how to configure vSphere Replication and how to protect and recover VMs Open vSphere Web Client: Verify vsphere Replication is enabled: Enable vSphere Replication for a virtual machine: Verify replicated VM is created: Recover replica…
Teach the user how to use vSphere Update Manager to update the VMware Tools and virtual machine hardware version Open vSphere Client: Review manual processes for updating VMware Tools and virtual hardware versions: Create a new baseline group in vSp…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question