Comparing Various Methods of Distributed Transactions

In this lesson, we will look at three ways to handle consistency across a distributed system:

• Two-phase commit (2PC) can offer the strongest consistency but has some large drawbacks.

• The other two are the choreographed saga and the orchestrated saga, which still offer a good consistency model and are excellent options when 2PCs are not an option.

The 2PC

At the center of a 2PC is a coordinator that sends the “Prepare” and “Commit” messages to all the participants. During the Prepare phase, each participant ...