Architecting a multi-region OAuth2 system with sub-50ms latency.
Global Latency
<40ms
Throughput
150k RPM
Data Consistency
99.999%
We implemented a globally distributed Redis cluster with CRDT-based synchronization and a gRPC communication layer between edge nodes.
Deployed Go-based proxies at the edge to handle SSL termination and request routing.
Multi-region Redis clusters using global data-sync to keep sessions alive across continents.
Replaced REST with gRPC for internal service communication to reduce overhead by 40%.
func (s *AuthServer) ValidateSession(ctx context.Context, req *pb.AuthRequest) (*pb.AuthResponse, error) {
session, err := s.cache.Get(ctx, req.SessionID).Result()
if err == redis.Nil {
return nil, status.Errorf(codes.Unauthenticated, "session_expired")
}
return &pb.AuthResponse{Valid: true, UserID: session.UserID}, nil
}