Thanks to everyone who responded to this thread. I switched our dev servers
over to a Hazelcast  ticket registry (keeping MongoDb for the service
registry) this afternoon, and assuming no problems, we'll gradually move it
from dev to test to production.

--Dave

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On Tue, Feb 26, 2019 at 12:12 PM Drew Liscomb <aliscombcommerce...@gmail.com>
wrote:

> Hi Dave,
>
> We are shifting our SSO to AWS, so our current config is first, and our
> intended configuration is after the arrow.
>
>    1. Hazelcast -> Redis
>    2. 2 -> 2?
>    3. 2 -> 1
>    4. Same VM -> Different
>    5. ServiceTicket validations: >150k /day on the busiest day in the
>    past 7 days
>    6. Currently, the ticket registry is ephemeral intentionally through
>    Hazelcast.  Getting it configured isn't hard, but it can be complicated.
>    We're moving to Redis because the auto-discovery requirements don't play
>    well in AWS.
>
> So, to answer your real query, I would recommend Hazelcast.  The in-memory
> aspect gives us the performance needed.  Furthermore, we have a load
> balancer that pins each IP to a single CAS node with a 'sticky session'
> cookie.  That way, the TGT & ST are 'right there' for any return trips.
>
> Kind regards,
> Drew
>
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