When is the journal cleaned up ?

[mylos78]

Hi all!

I'm planning to use a replication (instead of shared store) for a cluster of WildFly nodes. However, from the documentation I can read that the full journal is replicated. So my question is: will the journal be rolled or cleaned when the messages are delivered ? or it will keep growing until I delete manually it ?

Thanks!

Mylos

[ataylor]

as messages, transactions etc are delivered/commited they are removed from the journal.

[mylos78]

Thanks Andy!

So if my understanding is correct, what will be replicated through the network is only the journal with messages which have not been delivered, right ?

Thanks!

[jbertram]

So if my understanding is correct, what will be replicated through the network is only the journal with messages which have not been delivered, right ?

No, that's not quite right.  Every time a persistent (i.e durable) message is sent to a queue that message is written to the journal and that journal write is then replicated from the live to the backup.  When a persistent message is consumed from a queue another journal update is made and that update is also replicated from the live to the backup.  There's no meaningful sense of "messages which have not been delivered" in relation to journal replication.

[mylos78]

Thanks for pointing out this Justin.