Shakespeare’s question “To be, or not to be?” is considerably more famous than ours. However, like Shakespeare’s question, ours also poses a stark choice, and the answer can mean the difference between life and death for a company confronted with “the slings and arrows of outrageous fortune”. Data replication has two major attractions.

It can distribute copies of information to one or more sites. It can also provide failure recovery to keep data constantly available to users, customers, and partners. Increasingly, disaster recovery and 24/7 operation is expected and demanded by computer users. As a result, the latter attraction of replication is currently driving replication implementation in systems of all types and sizes. Here, we outline two approaches to replication which are available to OpenEdge DB administrators. Both are widely used, and each has its own advantages and disadvantages.

The intention is to analyze the techniques and technologies, in order to assist you in deciding which is better suited to your particular situation. This document does not attempt to sell a replication approach. Nor is it biased towards either technology. The intention is to be pragmatic, the better to help you to make the right decision. Your decision should be based on a thorough understanding of what both the business and IT requirements are. We leave the balancing of these considerations entirely in your hands.