5.2. Durable Queues and Guaranteed Delivery
5.2.1. Configure persistence stores
The Red Hat Enterprise Messaging broker enables persistence by default. To verify that persistence is active, make sure that the log shows that the journal is created and the store module initialized when the broker is started. The broker log will contain a line:
notice Journal "TplStore": Created
Important
If the persistence module is not loaded, messages and the broker state will not be stored to disk, even if the queue is marked durable, and messages are marked persistent.
The
--store-dir
command specifies the directory used for the persistence store and any configuration information. The default directory is /var/lib/qpidd
when qpidd
is run as a service, or ~/.qpidd
when qpidd
is run from the command line. If --store-dir
is not specified, a subdirectory is created within the directory identified by --data-dir
; if --store-dir
is not specified, and --no-data-dir
is specified, an error is raised.
Important
Only one running broker can access a data directory at a time. If another broker attempts to access the data directory it will fail with an error stating:
Exception: Data directory is locked by another process.