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How to take Snapshot in VMware and How to restore, Please help.

I am planning to install new applicaiton in one of our virtual machine for testing, I am planning to take snapshot. If testing fails then I need to revert back to old configuration. Please help me to take snapshot in vmware and restore steps.
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Sekar Chinnakannu
Asked:
Sekar Chinnakannu
2 Solutions
 
Danny McDanielClinical Systems AnalystCommented:
To take a snapshot, there's an icon along the toolbar or you can right-click on the VM and select the snapshot manager.

understanding virtual machine snapshots in vmware esx (http://kb.vmware.com/kb/1015180)

Best practices for virtual machine snapshots in the VMware environment (http://kb.vmware.com/kb/1025279)

To revert the snapshot bring up the snapshot manager or right-click on the VM or click on the icon in the toolbar
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Sekar ChinnakannuSenior EngineerAuthor Commented:
What type of file will take while taking snapshot and how much space will it take.
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Paul SolovyovskySenior IT AdvisorCommented:
Taking a snapshot create a new vmdk and render the old vmdk read only.  All written changes are in the new vmdk and will depend on the amount of actual change.  To write the snapshot to the original disk (delete snapshot) will require the space of the snapshot plus about 10% for overhead.  To revert back to original will just remove the delta vmdk and give you your initial vmdk
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David_HagermanCommented:
The way the snapshot works is that it keeps your original file in tact and then any change is written to a new file. if you browse your data store you will be able to see the new snapshot file . the file extension is a vmsn file.

With regards to the space it will take is directly proportional to what changes you make. What I have noticed is that the provisioned space will automatically double and a snap shot file of approx. 2Gb will be created. The changes you make will be amended to this file.

I hope this helps.

.Dave
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