BDB - Virtualhost backed with Oracle Berkeley DB JE

BDB HA - Virtualhost backed with Oracle BDB utilising High Availability

DERBY - Virtualhost backed with Apache Derby

JDBC - Virtualhost backed with an external database ^[6]

Memory - In-memory node (changes lost on Broker restart)

Provided - Virtualhost that co-locates message data within the parent virtualhost node ^[7].

use_async_message_store_recovery Controls the background recovery feature.

Name the virtualhost. This is the name the messaging clients refer to when forming a connection to the Broker.

Store Path/JDBC URL. Refers the file system location or database URL used to store the message data.

Store overflow/underflow. Some virtualhosts have the ability to limit the of the cumulative size of all the messages contained within the store. This feature is described in detail Section 9.2, “Disk Space Management”.

Connection thread pool size. Number of worker threads used to perform messaging with connected clients.

Defaults to 64 or double the maximum number of available processors, whichever is the larger.

Number of selectors. Number of worker threads used from the thread pool to dispatch I/O activity to the worker threads.

Defaults to one eighth of the thread pool size. Minimum 1.

Store transaction timeouts. Warns of long running producer transactions. See Section 9.3, “Transaction Timeout”

Synchronization policy. HA only. See Section 10.4.2, “Synchronization Policy”

Exchange

Queue

Stop. Stops the virtualhost. This closes any existing messaging connections to the virtualhost and prevents new ones. Any inflight transactions are rolled back. Non durable queues and non durable exchanges are lost. Transient messages or persistent messages on non-durable queues are lost.

Start. Activates the virtualhost.