File system overhead on Esxi7

[bigslash]

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?

[TheBobkin · Accepted solution]

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

Bob

[bigslash]

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 .

[bigslash]