Before upgrading, back up your data. Use the mysqldump tool to back up your cluster's central database, then back up the local configuration stored in the config_local.db file on each node. Refer to How to Back Up Access Server Configuration for details.
For the full cluster upgrade procedure, refer to the Option: Upgrade Access Servers in a cluster setup section in the Access Server update tutorial:
- Access Server 3.x: Tutorial: Update Your Access Server Version — Upgrade Access Servers in a cluster setup
- Access Server 2.x: Tutorial: Update Your Access Server Version — Upgrade Access Servers in a cluster setup
The tutorial walks you through a rolling upgrade, which updates nodes one at a time to minimize downtime and keep the cluster available throughout the process.
If you have additional questions, please submit a ticket.
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