[clug] Clustering file systems, without excluding windows

Paul TBBle Hampson Paul.Hampson at Pobox.com
Fri Aug 17 02:49:52 GMT 2007

On Fri, Aug 17, 2007 at 10:11:42AM +1000, Robert Edwards wrote:
> Paul TBBle Hampson wrote:
> >On Thu, Aug 16, 2007 at 02:54:05PM +1000, Robert Edwards wrote:
> >>Speaking of ATA over Ethernet (AoE), we are just in the process of
> >>commissioning a Coraid SR1521 15-disk AoE rack (with 8 x 750GB drives).
> >>I might be at a stage to lug it downstairs at next weeks CLUG meeting
> >>if anyone wants an up-close squiz at the innards and a short talk about
> >>how it all fits together.
> >>At this stage, I am looking at Lustre and GFS as two candidates for
> >>the clustered F/S. Andrew Tridgell spoke about IBMs proprietry GPFS
> >>during his recent CLUG talk on Samba Clustering - we aren't interested
> >>in going there at this stage. I have no interest in trying to make
> >>mine "work with Windoze", so can't help on that at all.
> >Heh. Went to reread up on Lustre, to work out why I took it off my list
> >the first time, and was reminded that clustered file systems need common
> >UID/GIDs between the servers. I've not set that up yet, so I guess
> >clustering's off my chart in the end, since I really don't want to put
> >that much time into LDAP.

> "common" (or consistent) UID/GIDs are a fact of life for any distributed
> filesystem whether it is clustered or more traditionally shared
> (NFS/Samba etc.). That is why Windoze has Domains and Domain Controllers
> and why NFS usually sits with NIS or LDAP etc.

> Can't really see how you can build a multiple-server HA system if the
> servers don't have access to a common UIG/GID namespace. Or am I missing
> something here?

Multi-server, I indeed can't. That's why I rejected the idea months ago,
and then forgot last week why I rejected it. >_<

If I had Samba4 available, and was building it from scratch, I'd prolly
rebuild it as a samba4-controlled AD domain, and get all the happiness
that would so richly bring.

Instead I'm going to see if I can find Jon Oxer's notes about
live-migration of a bare-metal server into a domU. ^_^

Paul "TBBle" Hampson, B.Sc, LPI, MCSE
Very-later-year Asian Studies student, ANU
The Boss, Bubblesworth Pty Ltd (ABN: 51 095 284 361)
Paul.Hampson at Pobox.com

Of course Pacman didn't influence us as kids. If it did,
we'd be running around in darkened rooms, popping pills and
listening to repetitive music.
 -- Kristian Wilson, Nintendo, Inc, 1989

License: http://creativecommons.org/licenses/by/2.1/au/
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