Data Synchronization Internals

Abstract

Now that we have looked at the Availability Groups concepts and common topologies, it’s time to dive deeper into the internals. We have already seen that, Always On Availability Groups support two availability modes (i.e., asynchronous-commit mode and synchronous-commit mode). In this chapter, we will try to understand how the replication of a transaction log blocks work from the primary replica to a secondary replica in synchronous-commit and asynchronous-commit modes.