Using Source

You will need a copy of the nats-server source locally and will need to be in the jetstream branch.

nats-server -js

Output

nats-server -js -sd /tmp/test

Output

// enables jetstream, an empty block will enable and use defaults
    // jetstream data will be in /data/nats-server/jetstream
    store_dir: "/data/nats-server"
    max_memory_store: 1073741824
    // 10GB
}