![]() ![]() This can occur when a snapshot has been deleted from the web console but the underlying disk files in the VM folder still exist. ![]() “Virtual machine disks consolidation is needed” You would then run the snapshot consolidation option and the snapshot would get committed.After deleting snapshots on a VM either by deleting an individual snapshot or selecting “Delete All” snapshots, you may see the following warning for the VM, stating that disk consolidation is needed. With the consolidation option, when you initiate a snapshot deletion, if the snapshot fails to delete, the VM will then generate a warning letting you know that a consolidation is required. In the past there were incidents where a user would initiate a snapshot deletion thinking the snapshot got deleted, yet to find out later that that’s not the case. The purpose of consolidate is if the snapshot deletion process was not successful. With vSphere 5, a new option called consolidate was introduced. When initiating a snapshot delete action, the delta disk changes are then written to the base or parent VMDK file and the snapshot is deleted. After consolidation, redundant disks are removed, which improves virtual machine performance and saves storage space. The snapshot Consolidation searches for hierarchies or delta disks to combine without violating data dependency. This might happen, for example, if you delete a snapshot but its associated disk does not commit back to the base disk. ![]() Snapshot consolidation is useful when snapshot disks fail to compact after a Delete or Delete all operation or if the disk did not consolidate. When you delete the base parent snapshot, all changes merge with the base virtual machine disk. Deleting a snapshot consolidates the changes between snapshots and previous disk states and writes to the parent disk all data from the delta disk that contains the information about the deleted snapshot. The snapshot files are consolidated and written to the parent snapshot disk and merge with the virtual machine base disk.ĭeleting a snapshot leaves the current state of the virtual machine or any other snapshot untouched. ![]()
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