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Best Guest VM Filesystem for NTFS Host

I am setting up a Linux server (probably will be NixOS) where my VM disk files will be stored on top of an NTFS partition. (Yes I know NTFS sucks but it has to be this way.)

I am asking which guest filesystem will have the best performance for a very mixed workload. If I had access to the extra features of BTRFS or ZFS I would use them but I have no idea how CoW interacts with NTFS; that is why I am asking here.

Also I would like some NTFS performance tuning pointers.

possiblylinux127 ,

I don’t understand. Why would you store VM disks on NTFS? This isn’t a viable solution and you need to rethink your design. Also for guest filesystems I would go with ext4 as it has lower overhead while still being reasonably modern.

pyrosis ,
@pyrosis@lemmy.world avatar

Within guests these days I just use XFS, UFS, or NTFS depending on the os. The hypervisor can have zfs or ceph.

possiblylinux127 ,

Ufs seems weird to use outside of flash

catloaf ,

If you’re really concerned with performance, benchmark each one in your own environment.

Ideally, you just wouldn’t do this.

SteveTech ,

I have no idea how CoW interacts with NTFS

With btrfs you can disable COW for specific files, that might give you a little performance boost.

MissLazorBoobies ,

why does it have to be this way?

Wangus ,

I would also like to know why it has to be this way. Are you planning to dual boot I need that partition available in Windows?

CMDR_Horn ,

What will this be running on?

Shadow , (edited )
@Shadow@lemmy.ca avatar

Ntfs isn’t going to care or even be aware of the hypervisor FS, zfs or btrfs would both work fine.

Making sure you don’t have misaligned sectors, is pretty much the only major pitfall. Make sure you use paravirt storage and network drivers.

Edit: I just realized you’re asking for the opposite direction, but ultimately the same guidelines apply. It doesn’t matter what filesystems are on what, with the above caveats.

Bakkoda ,

Is it possible to do something like iscsi?

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