[OpenID] OpenId downtime

[Eric Norman]

On Dec 6, 2007, at 10:26 PM, Eric Norman wrote:

>
> On Dec 6, 2007, at 9:29 PM, Martin Fick wrote:
>
>> --- David Recordon <drecordon at sixapart.com> wrote:
>>> It seems you already do this today with an email
>>> address from
>>> yahoo.com.  I could imagine a scenario like email
>>> where the majority
>>> of OpenID Providers are these very large service
>>> providers which
>>> already handle services that can't go down.
>>
>> Ah, but what you seem to be overlooking is how
>> they achieve this, they have DNS help!  With MX
>> records http://en.wikipedia.org/wiki/Mx_record
>> they can specify several servers (and rank them)
>> through DNS which allows someone on the other
>> side of the globe to spool their email if there
>> main servers go down.
>
> You can also have multiple A records (IP numbers)
> for a server.  The client is supposed to try 'em all.

Oops.  I didn't mean to say "server" there; try multiple
IPs per DNS name.

> This is how redundancy is build into a lot of LDAP
> servers.  This is a possibility for URL-based OpenIDs.
> I don't know about the XRI critters.
>
> Of course, the downside is that you need more hardware
> and have a coordination and synchronization problem
> at the OP side.
>
> Eric Norman
>
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