On Wed, 2004-03-31 at 17:38 -0500, Havoc Pennington wrote:
Hi,
A possibly related discussion; we've been wondering if we can make the OS image read-only (mounting it that way, or via selinux).
Then have /tmp and probably /var in RAM (or wiped on boot), and have home directories and server/app data such as web pages to be served on network mounts.
This allows you to maintain the OS image in a central location and the homedirs and server/app data in central locations, and have a single network-wide master copy of all important state.
Any filesystem rearrangement probably impacts this plan (some rearrangement may be needed for this plan).
Havoc
Hello Havoc et al,
I am sure most would disagree, but if Fedora even goes in the direction that would allow this setup to be done easily, you run into several problems of course... the primary one being heterogeneous systems (even if they all are x86, they won't all be the same as far as sse sse2 3dnow 3dnowext, etc.). Also, you have /etc.
However, these can all be overcome using symlinks and other fun things. However, and maybe NFS4 covers this, I don't know. I know codafs and intermezzo do this to different levels. The biggest thing needed (but maybe not always wanted) is a caching file system. One that supports journals locally, acls and all that. Preferably something that does a cached and networked version of ext3. I know codafs doesn't integrate the acls, etc. as well as intermezzo does and wouldn't work as an underpinnings for samba. Intermezzo might, but I don't know. I haven't kept up the last year or two.
Anyway: cached = on disk cache that is only lost when specifically told to be lost or gets bumped due to local disk space being nearly full and is updated automatically from the server.
ACLs and the other extended attributes maybe should be pluggable, depending on the underpinning system (required to be the same on both ends, required to be journaled, etc.)
Sorry if none of this makes sense. I am a bit sleep deprived at the moment.
Trever -- "Having Microsoft give us advice on open standards is like W.C. Fields giving moral advice to the Mormon Tabernacle Choir" -- Scott McNealy, Sun Microsystems Inc.