Latency, Conflicts, Consistency: MySQL Group Replication vs. Galera Cluster

This in-depth presentation from Severalnines’s Support Engineering Team, Ashraf Sharif, In this deep dive, we compare and contrast MySQL Group Replication (MGR) and Galera multi-primary architectures to give architects and senior ops teams a practical decision framework around latency, conflict resolution and consistency enforcement.

What you’ll learn in this webinar:

• Architectural contrasts that matter in production: virtual sync (MGR) vs. synchronous write-set replication (Galera).
• Conflict handling models: transaction-based rollbacks vs. write-set certification and how each impacts throughput under contention.
• Latency realities: how inter-node and cross-region RTT shape commit paths, stall patterns, and tail latencies.
• Operational trade-offs: membership and quorum, SST/IST vs. distributed recovery, failover behavior, and split-brain avoidance.
• Performance & scaling patterns: when multi-primary helps and hurts, and how to design for read scaling without sabotaging writes.