I want to use GFS for MySQL. Is that okay?
Depends on what you’re going to do. The problem is that MySQL is not currently cluster-aware. Therefore, multiple instances of MySQL in the cluster will not be aware of each other, and will subsequently corrupt your database. This is a MySQL limitation, not a GFS limitation. Since you can’t have multiple instances, you can’t do load balancing with multiple MySQL servers. If you only want one MySQL server running, that’s okay. You can use rgmanager to manage a smooth failover to a redundant MySQL server (active-passive) if your MySQL server goes down. However, you should be aware that in some releases, the mysql init script has an easily-fixed problem where it doesn’t return the proper return code. That can result in rgmanager problems with starting the service. MySQL sells a clustered version of MySQL called “MySQL Cluster”, but that does its own method of clustering, and is completely separate from Cluster Suite and GFS. For more information, see: http://www.mysql.com/products/databas
