ACTIVE-PASSIVE

Active-passive topology. See Enterprise Integration Patterns.

Definition

Active-passive — high availability topology with a primary node that handles traffic and a secondary node in warm standby, promoted on failure.

Origin

The most common pattern in legacy IT. Documented by cluster products (Red Hat Cluster Suite, Pacemaker) and Google SRE patterns.

Use

A legacy AS2 gateway in active-passive: the primary node holds the virtual IP and signs MDNs; on failure, the secondary takes over and resumes the IP queue, with a typical RTO of 30 to 120 seconds.

Related

• ACTIVE ACTIVE — see entry.
• B2B GATEWAY — see entry.
• CUTOVER WINDOW — see entry.