Limit to the number of Vhosts under one entityID?

Tom Scavo trscavo at
Mon Nov 24 08:23:53 EST 2014

On Mon, Nov 24, 2014 at 5:45 AM, Peter Schober
<peter.schober at> wrote:
> * Barry Johnson <CYCLIST at> [2014-11-21 16:22]:
>> Does anyone know if there is an upper limit to how many distinct
>> virtual hosts can be supported under one entityID?   Assuming we add
>> the appropriate ACS endpoints to the metadata could an SP
>> theoretically support hundreds of virtual hosts?
> Univie has more than 1300 Shib-enabled vhosts in their mass-hosting
> web environment (one ACS URL for every TLS-enabled vhost; there also
> are non-TLS vhosts), most on a single entityID, IIRC.

I can't beat that :-) but FYI there are two SPs in InCommon metadata
with at least 100 ACS endpoints:

$ curl --silent $MD_LOCATION | grep -F 'index="100"' | wc -l

I don't know if either of them signs AuthnRequests, however.


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