May 06, 2014

What is the Difference Between .vmx and .vmdk files

Virtual machines using VMware technology have two main file extensions:


  1.  .vmx: This file contains all the configurations that make up a particular VM, such as how many virtual processors are allocated, how much memory is reserved, the path to the hard drive, and any additional components that are configured for this VM.

  2. .vmdk: This file is the physical hard drive equivalent. It holds the file system, the operating system, and any applications or software loaded on this VM.

VMware’s file extension for VMs is known as VMDK, whereas Microsoft and Citrix for instance have the file extension as VHD. Hopefully one day, an industry standard will emerge, which would then allow for VMs to be run on any hypervisor.

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