Redis as Storage Service for SP

[Cantor, Scott]

> What about in the case (that is identified in the docs), when SPs need
> to make artifact queries to the IdP?

That doesn't have anything to do with the SP's clustering.

> That's pretty clearly the kind of thing where this is needed in a cluster.

It isn't clear to me, I'm afraid.

> Don't be overly literal and say that this question is specifically about "SP sessions",

If it wasn't, then I have no idea what it's about. The storage service in the SP is about SP sessions (and some other pieces like the replay cache). It would admittedly affect *outbound artifacts* in the SP, but that is not even implemented by the IdP today, and is basically unheard of in the wild in SAML.

Inbound artifacts don't have any different clustering implications in the SP than POST does.

-- Scott