Periodically taking snapshots of your VMware ESXi virtual machine state is essential to being able to revert problematic application upgrades and quickly correct other issues. However, allowing VMware snapshot files to accumulate without proper oversight can have a profound effect on virtual machine performance. In fact, if your storage runs out of free disk space, your virtual machines may not be able to even start, let alone run at peak performance. Therefore, to mitigate problems that could threaten the availability or integrity of your data, you need proper VMware snapshot management.
What is a VMware snapshot? A VMware snapshot is a copy of the state of a virtual machine disk file (VMDK) at a given moment in time, taken by the vSphere Client Snapshot Manager. Snapshots provide a change log (delta) for the virtual disk, and are used to restore a virtual machine back to a previous state. Here’s what you need know about how VMware snapshots work:
VMware Snapshot Manager provides only limited snapshot management functionality. You can see the snapshots of only one virtual machine at a time. Plus, to get the detailed information you need to manage snapshots, such as VMware snapshot size or disk space requirements, you have to go to the storage. Therefore, while VMware Snapshot Manager is useful, it may not be sufficient to enable you to take control over VMware snapshot creation across all of your virtual machines in order to minimize the risks to memory, storage and performance.
Netwrix Auditor for VMware enables you to manage your snapshots more efficiently. You can: