[SASAG] kerberos / nfs / fhcrc

[Peter Woodman]

On Tue, May 13, 2008 at 1:48 PM, Skylar Thompson <skylar at cs.earlham.edu> wrote:
>  My understanding is that AFS doesn't do very well under write-intensive
> workloads. We have a very write-intensive environment, so I think NFS comes
> out ahead in that regard. I don't have any real experience with AFS, so feel
> free to correct that assumption.

AFS also has some (useful but) odd conventions with regards to volume
management and local filesystem access that make it unsuitable as a
drop-in replacement for NFS. You can't just export an existing
filesystem using AFS- it has its own on-disk format that, as far as I
know, can't be accessed 'locally' from the node it lives on.  There's
also issues with ticket expiry and long-running jobs- to access the
filesystem, the user principal must have a valid ticket checked out.
IIRC, with LDAP+NFSv4, the machine credentials are enough.