Group Replication VS Percona XtraDB Cluster: The True Cost of Consistency

Overview When building high-availability MySQL environments, the choice between MySQL Group Replication (GR) and Percona XtraDB Cluster (PXC) often comes down to how they handle the eternal database dilemma: data consistency versus performance. While both provide "synchronous-like" replication, they approach the problem of stale reads —reading data that has been committed on one node but not yet…