[OpenAFS] Re: Moving Magic Trio to another domain

[stephen@physics.unc.edu]

Gotcha. I guess I hadn't followed Jukka's message closely enough. I thought 
he had already set up a new cell and you were referring only to changing 
fileservers. I see the bit about CellServDB now, so the non sequitur is 
mine.

On Tue, 24 Sep 2013, Andrew Deason wrote:

> On Tue, 24 Sep 2013 14:45:57 -0400 (EDT)
> stephen@physics.unc.edu wrote:
>
>>> You can't run an "old" and "new" server on the same machine from a
>>> single IP address, that's true. But you _can_ just run the "old"
>>> server, and point the old and new CellServDB entries at it, and it
>>> looks like two different cells and two different servers that serve
>>> the same data.
>>>
>>> To maybe help illustrate, it's like in HTTP/1.0 (without the 'host:
>>> ' header) having two different DNS A records for the same server. If
>>> you had the hostname newwww.example.com and oldwww.example.com both
>>> pointing to 198.51.100.5, they would both serve the same contents,
>>> but they sort of "look" like two different hosts.
>>
>> Interesting. In order to avoid hilarity in such a scenario, would it
>> be necessary to ensure matching of users and group (and id numbers of
>> both) in both cells' PTS database?
>
> In such a scenario, there's no "both databases". There's only one
> server, one ptdb, one vldb, one /vicepa partition, etc etc. I get the
> impression I'm not being clear enough, but I'm not sure how to be more
> clear. In such a scenario, a client's CellServDB could look like, for
> example:
>
>> old.example.com # old domain
> 198.51.100.5 # foo.old.example.com
>> new.example.com # new domain
> 198.51.100.5 # foo.new.example.com
>
> -- 
> Andrew Deason
> adeason@sinenomine.net
>
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