HornetQ Persistence Concepts

Internal

• WildFly HornetQ-Based Messaging Subsystem Concepts

Overview

Disk only.

HornetQ does not support database-based persistence. For reasons that went into this decision see https://developer.jboss.org/thread/153581. More details in "Messaging persistence in EAP 6.x" https://access.redhat.com/solutions/226743.

What Does HornetQ Persist?

Persistent Messages

All persistent messages must be stored on persistent storage, as mandated by the JMS specification. This is necessary to protect against messaging system failure: a persistent message can be presumably recovered from the persistent storage and re-sent.

Journal

When a node is started for the first time it persists a unique identifier into its journal directory. This ID is needed for proper formation of clusters.