Can I use Journal only?

[Tony Qian]

All,

Can I use journal only? If yes, how to configure it?

I'm really confused with this statement from ActiveMQ site about Journal. It seems you have to use database for durable subscription. What about broker never reaches journal checkpoints?

Kind of. The messages can be loaded directly from the journal (in case the message was removed swapped out of memory). But the journal cannot be used to to recover a durable subscription (he does not keep an ordered index of messages per durable sub). So when a durable sub is activated, then the journal checkpoints to flush any messaqges in the journal to the long term store and then the long term store is used to recover the durable subscription.

thanks,
Tony