MySQL 8.4 has two good options for High Availability clusters:
Galera Cluster (and Percona XtraDB Cluster (PXC)) plus MySQL
InnoDB Cluster. Both solutions are now mature enough, so what is
the deciding factor? Workload characteristics, application
compatibility (Galera is virtually synchronous; InnoDB Cluster
offers 2 modes – single primary mode, which is one instance being
read-write, with the rest being read only, and multi-primary
mode, which is closer to what Galera Cluster is) and operational
preferences, most likely will decide which one comes out top in
2025, is what we aim to answer at next week’s webinar.
Due to the lack of real-world usage statistics (we can tell you
how many Galera Cluster downloads we have, for example, or even
customer numbers, but we won’t have anything to compare against),
we look at proxy statistics, like …
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