def run_ps(self):
        """
            Lauches the parameter server process.
            Serves parameters to agents
        """
        ps_config = self.session_config.ps

        server = ShardedParameterServer(shards=ps_config.shards)

        server.launch()
        server.join()

            Lauches the parameter server process.
            Serves parameters to agents
        
surreal/launch/launcher.py