I have three machines running Stardog in High Availability Cluster configuration -what's the endpoint URL I should use to read and write to Stardog, and where should I configure it? I intend to use the SNARL API/protocol.
Assuming you have deployed the Proxy in all three machines as well, you should point your Stardog clients to any of the Proxy instances. The URL would be:
snarl://<proxy ip address>:<proxy port>/
As an aside, we have a mailing list for these types of questions at https://groups.google.com/a/clarkparsia.com/forum/#!forum/stardog