Information Technology Reference
In-Depth Information
grows. To update the metadata i les, LUNs must be locked, and this might adversely affect the
performance of other VMs and hosts using the same LUN.
To view or delete a snapshot or revert to an earlier snapshot, you use the Snapshot Manager.
Perform the following steps to access the Snapshot Manager:
1.
Use the vSphere Web Client to connect to a vCenter Server instance or use the vSphere
Client to connect to an individual ESXi host.
2.
In the inventory tree, right-click the name of the VM, and from the context menu select
Manage Snapshots.
3.
Select the appropriate snapshot to fall back to, as shown in Figure 9.30, and then click the
Revert To button.
Figure 9.30
h e Snapshot
Manager can revert
to a previous snap-
shot, but all data
written since that
snapshot was taken
and that hasn't
been backed up
elsewhere will
be lost.
To further illustrate the nature of snapshots, see Figure 9.31 and Figure 9.32. Figure 9.31
shows the i le system of a VM running Windows Server 2012 after data has been written into
two new folders named temp1 and temp2. Figure 9.32 shows the same VM but after reverting
to a snapshot taken before that data was written. As you can see, it's as if the new folders never
even existed. (And yes, we can assure you we didn't just delete the folders for these screen shots.
Te st it you r s el f!)
Figure 9.31
h is VM running
Windows Server
2012 has had some
data placed into two
temporary folders.
