Virtual Machine File System

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
VMFS
Pronunciation
/ˈvərʧuəl məˈʃin faɪl ˈsɪstəm/
Category
Computing
Related Field
Databases

Examples in Context

  1. After you create the empty logical disk and configure the virtual machine profile, the file system configuration inside the virtual machine needs to be updated.
  2. The Default Add Disk add-on creates a virtual disk on the virtual machine, formats the disk with the selected file system, and mounts the disk.
  3. To guarantee the correctness of defragmentation, actual mapping ( a mapping from data blocks of a virtual machine file to data blocks of a physical file system ) needs to be kept unchanged, as no data blocks have been moved.
  4. KVM also supports virtual machine images on shared file systems such as the Global File System ( GFS2 ) to allow virtual machine images to be shared between multiple hosts or shared using logical volumes.
  5. Therefore, image mapping ( a mapping from data blocks of a virtual machine disk image file to data blocks of a physical file system ) should be updated according to new file mapping to make actual mapping unchanged.