Path: utzoo!yunexus!geac!syntron!jtsv16!uunet!mcvax!nikhefh!e07
From: e07@nikhefh.hep.nl (Eric Wassenaar)
Newsgroups: comp.sys.apollo
Subject: NFS mounts on top of each other
Message-ID: <554@nikhefh.hep.nl>
Date: 24 Oct 88 23:37:47 GMT
Article-I.D.: nikhefh.554
Organization: Nikhef-H, Amsterdam (the Netherlands).
Lines: 24


In non-Apollo NFS implementations it is possible to mount remote NFS
filesystems on top of each order, like
   /etc/mount  rhost:/     /mountpoint
   /etc/mount  rhost:/usr  /mountpoint/usr
so that the whole remote filesystem tree can be transparently accessed
using the same pathname syntax, starting at /mountpoint, as on the remote
host itself. The mount points must be existing directories.

In the current (SR9.7) Apollo NFS implementation, this is impossible.
Mount points must be non-existing. They are created as objects of type
'nfs_gate' by the mount operation, and obviously cannot reside on already
mounted remote filesystems.

It is very unfortunate that Apollo NFS breaks this transparency.
Do we have a fundamental limitation, which will persist in future (SR10)
releases? Can other people live with this limitation?

-- Eric Wassenaar
-- 
Organization: NIKHEF-H, National Institute for Nuclear and High-Energy Physics
Address: Kruislaan 409, P.O. Box 41882, 1009 DB Amsterdam, the Netherlands
Phone: +31 20 5920412   Home phone: +31 20 909449    Telex: 10262 (hef nl)
Internet: e07@nikhefh.hep.nl  Bitnet: nikhefh!e07@mcvax.bitnet