[keycloak-user] Need info on Keycloak benchmarks & success stories

Hi, MGTS, Moscow's leading telephony and internet provider with ~4M subscribers, holds a tender for a web SSO solution to replace their current OpenAM. Our company participates with Keycloak/RHSSO based solution. We've successfully passed an RFI phase and advanced to RFP, where we will be asked to produce the following performance measurements: - single node capacity (logins/sec) for a known server configuration; - capacity increase per each node added to the cluster. Thus, I wanted to ask if anyone has performed such a sort of benchmarking for Keycloak, and if the results are available. If not, what's the best approach to perform benchmarking ourselves? Did anyone have success with keycloak-benchmark? Additionally, it would help us much if we could refer to some success stories of real-world Keycloak deployments, preferably in the telecom area. Thanks! Dmitry