Disaster Recovery Configuration

You can configure your appliance installation for disaster recovery (DR).

A disaster recovery configuration consists of two appliances at a production site matched with two appliances at a back-up site. Should there be a failure in the production site, you can recover activity at the back-up location. When the production site is back online, you can then restore activity at that location.

Requirements

  • All appliances in a DR configuration should be of the same model, either standard or high-performance. All appliances should also use the same TIBCO Enterprise Message Service Appliance software version.
  • DR operations require that the following ports be allowed between members of the DR cluster. These DR communications all use the EMS-IP address.
    • SSH port 22
    • RSYNC port 873
    • Agent port 9990

Structure

Disaster recovery requires four appliances, known as a quad. A quad is divided into two fault-tolerant pairs, the production pair and the backup pair. The terms production and backup here indicate the physical location, or site, of the appliances.

The appliances at the production site are designated Production-A and Production-B, whereas the appliances at the backup site are designated Backup-A and Backup-B. An appliance's designation is distinct from but related to its role.

The relationships between the quad of appliances is shown in the following image.

Roles

There are two roles in disaster recovery
  • DR leader
  • DR member

In most cases, Production-A is the DR leader, while the three remaining appliances, Production-B, Backup-A and Backup-B, are DR members.