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Re: [Per-Entity] implementing a cache on the client


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  • From: "Cantor, Scott" <>
  • To: Nick Roy <>, Thomas Scavo <>
  • Cc: "" <>
  • Subject: Re: [Per-Entity] implementing a cache on the client
  • Date: Wed, 27 Jul 2016 20:54:40 +0000
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On 7/27/16, 4:46 PM, "Nick Roy"
<>
wrote:

> If we design the service to be highly available, I don't think we need to
> worry about
> on-disk cache, which as Scott has mentioned is at the expense of the
> ability of other
> non-Shibboleth clients to support the same assumed requirement.

That is an assumption, obviously. ADFS, for example, probably does cache this
stuff, but that's partly because it doesn't really do on-demand metadata, so
"supporting MDQ" is really more a scripting exercise than a software feature.

I don't know what Ping might do now or later, but I can imagine I guess that
the more heavyweight products would store this stuff and be bolting on the
on-demand option at most anyway.

So perhaps I'm wrong about it, I don't know. Probably wouldn't take much to
get SSP to consider it.

> That said, if others want to run their own local copy, why don't they just
> stand up local
> HTTP proxies?

Caching proxies, at least. Obviously they can, but I was reacting to the idea
that we could somehow rely on that being common as a stopgap for the primary
being reliable enough. It was never the intent that the Shibboleth
implementation would demand that backstop.

-- Scott





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