Snapshot file that represents the difference between the current state of the virtual disk and the state that existed at the time the previous snapshot was taken. Vmname- number.vmdk, vmname- number-delta.vmdk, vmname- number-sesparse.vmdk SEsparse is a default format for all delta disks on the VMFS6 datastores. vmdk, -delta.vmdk, vmsd or -sesparse.vmdk, and vmsn files. The time the ESXi host takes to write the memory onto the disk depends on the amount of memory the virtual machine is configured to use.Ī Take Snapshot operation creates. Memory snapshots take longer to create than nonmemory snapshots. With nonmemory snapshots, you can only revert to a turned off virtual machine state. Capturing the memory state of the virtual machine lets you revert to a turned on virtual machine state. vmsn file that includes the active state of the virtual machine. This file contains line entries, which define the relationships between snapshots and between child disks for each snapshot. vmsd file that contains the virtual machine's snapshot information and is the primary source of information for the Snapshot Manager. This file does not appear as a separate file in the Datastore Browser. The flat disk contains the raw data for the base disk. flat.vmdk file that is one of two files that comprises the base disk. The files that make up the delta disk are called child disks or redo logs.
The other one is a corresponding file that contains the raw data. One is a small descriptor file that contains information about the virtual disk, such as geometry and child-parent relationship information. When you take a snapshot, the state of the virtual disk is preserved, the guest operating system stops writing to it, and a delta or child disk is created.Ī delta disk has two files. The delta disk represents the difference between the current state of the virtual disk and the state that existed at the time that the previous snapshot was taken. vmdk file to which the guest operating system can write. vmsn files are stored in the virtual machine directory. By default, the first and all delta disks are stored with the base. Snapshot FilesĪ snapshot consists of files that are stored on a supported storage device. These states are saved to files that reside with the virtual machine's base files. If you are taking a memory snapshot, you also capture the memory state of the virtual machine. When you take a snapshot, you capture the state of the virtual machine settings and the virtual disk.
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