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  • 1.  File system overhead on Esxi7

    Posted Oct 07, 2020 12:47 PM

    Hi to all,

    i am runiing a project for Vsan ROBO, and have 2 sites at the moment ready for production..At the moment we have only a couple of test vms in the environment.

    But i noticed that there is a huge amount of "File system overhead"  usage .

    we dont have dedup and compression enabled snce Hybrid disk groups are used.

    does anyone have a clue ? doi have start a case with vmware before we took those systems into production?

  • 2.  RE: File system overhead on Esxi7
    Best Answer

    Posted Oct 07, 2020 01:30 PM

    Hello bigslash

    That is not an unusually high or 'huge amount' of space used for file system overhead considering the size of the datastore - this is documented as being 1% just for on-disk format aside from what is needed for dedupe (e.g. it will use some space for file system regardless of dedupe enabled or not):

    Formatting Overhead Considerations | VMware® vSAN™ Design and Sizing Guide | VMware


  • 3.  RE: File system overhead on Esxi7

    Posted Oct 08, 2020 07:07 AM

    Thanks a lot  for your answer

    I thought it was proportional with the amount of data, so i was a ittle bir scared.

    Yesterday i had created some more data, and increased the usage of the datastore, but the "File system Overhead "  didnt go beyond to much.

    Just to inform if somebody else has this issue ,i am sendng this screenshot,which is after the data created .

  • 4.  RE: File system overhead on Esxi7

    Posted Oct 08, 2020 07:08 AM