[Lustre-discuss] NFS vs Lustre

[Brian J. Murrell]

On Sun, 2009-08-30 at 16:12 -0500, Nicolas Williams wrote:
> 
> One thing about NFS is that it's meant to be neutral w.r.t. the type of
> filesystem it shares.  So NFSv4, for example, has features for dealing
> with filesystems that don't have a notion of persistent inode number.
> Whereas Lustre has its own on-disk format and therefore can't be used to
> share just any type of filesystem.

You have "stumbled on to" an interesting, significant difference between
NFS and Lustre.  NFS is a protocol for sharing an existing filesystem.
Lustre is a filesystem -- so much so in fact, that NFS can even share it
out.

b.

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