| MGR | PXC | MHA | |
|---|---|---|---|
| advantage | Native high availability, ensure data consistency, multi-master support | Similar MGR | Mature and stable, small invasion of MySQL, ensure consistent data after downtime |
| Shortcoming | There are too new BUG (such as adding a new cluster goes down, there is a parallel copy inconsistency bug), management is not convenient (in conjunction with mysql-shell) | Large performance loss (reduced to 1/3), large transaction will be stuck entire cluster, you need to use a third-party MySQL release | Selected main way out of date and in line with third-party scripts automatically switch |
MHA inside the industry with the most, pxc secondly, MGR quite small due to the relatively new
There are other high-availability shared storage solutions, MMM (eliminated), Heartbeat + DRBD + MySQL, etc.
Personally optimistic about middleware (mysql router or proxysql) + MGR architecture