Paul B. Henson wrote:
On Sat, 22 Sep 2007, Jonathan Loran wrote:
My gut tells me that you won't have much trouble mounting 50K file
systems with ZFS. But who knows until you try. My questions for you is
can you lab this out?
Yeah, after this research phase has been completed, we're going to have to
go into a prototyping phase. I should be able to get funding for a half
dozen or so x4100 systems to play with. We standardized on those systems
for our Linux deployment.
test with your name service in the loop. You may need netgroups to
delineate permissions for your shares, and to define your automounter
maps.
We're planning to use NFSv4 with Kerberos authentication, so shouldn't need
netgroups. Tentatively I think I'd put automounter maps in LDAP, although
doing so for both Solaris and Linux at the same time based on a little
quick research seems possibly problematic.
We finally got autofs maps via LDAP working smoothly with both Linux
(CentOS 4.x and 5.x) and Solaris (8,9,10). It took a lot of trial and
error. We settled on the Fedora Directory server, because that worked
across the board. I'm not the admin who did the leg work on that
though, so I can't really comment as to where we ran into problems. If
you want, I can find out more on that and respond off the list.
Also, as you may know, Linux doesn't play well with hundreds of
concurrent mount operations. If you use Linux NFS clients in your
environment, be sure to lab that out as well.
I didn't know that -- we're currently using RHEL 4 and Gentoo distributions
for a number of services. I've done some initial testing of NFSv4, but
never tried lots of simultaneous mounts...
Sort of an old problem, but using the insecure option in your
exports/shares and mount opt helps. May have been patched by now
though. Too much Linux talk for this list ;)
At any rate, you may indeed be an outlier with so many file systems and
NFS mounts, but I imagine many of us are waiting on the edge of our seats
to see if you can make it all work. Speaking for my self, I would love
to know how ZFS, NFS and LDAP scale up to such a huge system.
I don't necessarily mind being a pioneer, but not on this particular
project -- it has a rather high visibility and it would not be good for it
to blow chunks after deployment when use starts scaling up 8-/.
Good luck.
--
- _____/ _____/ / - Jonathan Loran - -
- / / / IT Manager -
- _____ / _____ / / Space Sciences Laboratory, UC Berkeley
- / / / (510) 643-5146 [EMAIL PROTECTED]
- ______/ ______/ ______/ AST:7731^29u18e3
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