[OpenAFS] Re: afs vs nfs

[Derek Atkins]

"Neulinger, Nathan" <nneul@umr.edu> writes:

> Something as simple as having an alternative namei that would look the
> same down below, but would have the top level directory be the RW volume
> id corresponding to whatever data is being stored.

Um, the top-level directory (well, two top-level dirs) already is
(are) the volume id.  It's just encoded in base64, and split into
two sets of bits.  But it's still the volumeID.  E.g.

./+/++++U/+/+/0++++6
./1/1+++U/special/zzzzPA++++0

These are in two different volumes.

> This would allow the top level dirs and volume header to be backed up
> and restored as regular files. Granted you would not have the true
> snapshot like you can get with vos, but even that is subject to timing
> as far as high level file access goes. 

Current namei already gives you that, actually.

-derek
-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
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