is it possible run JetStream and nats-streaming

[alifpay]

we have nats-streaming server and version of nats-server 2.3.3

can we active JetStream?

or setup new nat-server?

[wallyqs]

It is possible since they are in different namespaces, nats-streaming runs under _STAN.> global namespace whereas nats-server jetstream is just NATS subjects. It would only break if you create a subject named _STAN.foo to be used with JetStream. For JetStream usage I recommend starting with latest nats-server v2.6.3 and Go client v1.13.0 since would give the most stable setup.