[OpenID] Acceptable OP uptimes

[Peter Williams]

If one thinks along these lines, one gets into the same limits as kerberos faces (in wan, open nets) concerning adoption. Even if tecnically solve the single point of failure, the cost becomes prohibitive as with all these subject-centric capability/assertion schemes.

 I can only conceive of deploying openid first in a) wall garden theartes of operation and b) account linking modes allowing for local login fallbacks.

Sso in open systems seems to work fine in practice as a pure convenience, but not as a engineering/social dogma.

-----Original Message-----
From: Jack Cleaver <jack at jackpot.uk.net>
Sent: Wednesday, December 12, 2007 9:54 AM
To: general at openid.net <general at openid.net>
Subject: Re: [OpenID] Acceptable OP uptimes

Johannes Ernst wrote:
> As users of OpenID, what kind of availability requirements do you 
> realistically have?
> 
> 99%     [3 days out of service per year]
> 99.9%     [9 hours out of service per year]
> 99.99%     [less than an hour per year]
> 99.999%     [5 minutes per year]

It's not possible to give a simple answer to that question.

99% would be fine for me, as long as I am not relying on OpenID during
the 3 days that my OP is down. And even if I were, 99% would still be
fine if those 3 days' downtime were spread over the year, as some 72
1-hour outages, about every 5 days. On the other hand, given an outage
comprising a solid 3-day block starting at 9:00am on a Monday, by
Tuesday morning I would have abandoned that OP forever.

The question keeps coming up: is OpenID just for commenting on blogs, or
is it supposed to be useful for more important purposes? I'm not given
to commenting on blogs. But if that's all it's meant for, then my remark
(above) is unreasonable - you're really asking how much inconvenience
I'm prepared to put up with, rather than how serious a 3-day outage
would be.

-- 
Jack.
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