Deleting a snapshot can cause a performance impact to your storage layer, especially if there's a lot of writes to the guest during the process. If you can do it when it's powered off, there's no writes at all, obviously, so do that.
Regarding space : "From ESX4. VMware ESX now incorporates improved consolidation procedures which lessen the demand of free space. You are able to consolidate virtual machine delta disks even while minimal free space on your datastore is available.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Is it safe to delete this snapshot?
Ask Question. Asked 8 years, 3 months ago. Active 8 years, 3 months ago. Viewed 10k times. After looking into it, I've found the following snapshot presumably from a borked backup job I would like to delete this snapshot in hopes of resolving my issue, however I need to ensure that the machine isn't negatively affected by this. Reading the VMWare documentation on the issue it states : Deleting a snapshot leaves the current state of the virtual machine or any other snapshot untouched.
Example of snapshot removal VimApi call in Task log. Check event logs on the Veeam server and vCenter server. More information. Couldn't find what you were looking for? Below you can submit an idea for a new knowledge base article. Thank you! Spelling error in text A comment for a webmaster optional.
Delete the snapshot if you want your machine to stay at its current state. Go To a snapshot if you want to "undo" your changes. What you are basically doing with the snapshot is making a copy of the drive. That copy then is becoming the current drive and the old snapshot you had would be saved. So you basically have two drives at this point on the datastore.
When you consolidate them it is going to merge all of them together and will take a fair amount of time depending on the size of the drive. This also depends on the amount that the data actually changed too. Justin is right on with the deleting. If you delete the snapshots you will go back to the original and lose all of that data changes from time x to time y. You want to consolidate or you will lose data. Deleting the snapshot gets rid of the logical point in time state, so you won't be able to go back.
That's what you need to do. And if you have to wait until after hours, then your SAN wasn't sized correctly. What does it all mean? One of life's great questions I emailed several of my colleagues about this a while back, and I think most of the information still applies:. VMware is a very powerful virtualization product, with many features that aren't available in a traditional server implementation.
One advantageous feature is the use of snapshots. Before making a big change to a virtual machine, you can take a snapshot. Then, if something goes terribly wrong, all you have to do is revert the snapshot to restore the VM to its original state. However, there are a few items to note regarding the use of snapshots: - Snapshots aren't intended to be kept long-term.
Take a snapshot before making a change; if the change works, remove the snapshot and commit any changes to the original parent disk. If the child disks grow too large, it's only a matter of time before their associated VMs run into serious issues.
This illustrates the previous point of not keeping snapshots long-term. Given this fact, if you plan to clone a VM for troubleshooting, make sure it doesn't have any snapshots before you clone it.
After you understand snapshots a bit more, the following articles may prove useful. You can create a snapshot file with or without memory. A memory snapshot also captures the memory state of the VM and its power settings. If you create a snapshot without memory and revert to that snapshot, you will have to start the VM manually. If you want to quiesce the guest file system, the VM has to have VMware tools installed. You can use the vSphere web client to take new snapshots, delete snapshots and more.
Here are all the options:. In the pop-up window, enter a name and description for the snapshot. It is recommended to include a detailed description of what has been done to the VM or how the VM is configured.
If you check this box and the VM is running when you take a snapshot, the icon of the snapshot will be green. The figure below shows several snapshots to choose from. If we revert to a snapshot with a green icon, the VM will be in running state.
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