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9.8.2. Running a Maintenance Operation

JBoss ON regularly takes snapshots or backups of its monitoring and system data. This occurs for two events:
  • When a node is added or removed from the cluster.
  • As part of weekly maintenance.
    The weekly maintanenace snapshot is scheduled for Sunday at 00:30. The schedule is fixed and cannot be changed.
A maintenance operation has two parts:
  1. Take a snapshot of every node in the cluster.
  2. Run a repair operation on every node. The repair operation is run on each node consecutively, to update and resolve any data issues.
It is possible to initiate a maintenance operation outside its schedule through the JBoss ON command-line tool: 
rhqadmin@localhost:7080$ StorageNodeManager.runClusterMaintenance()

Note

The node repair operation is CPU- and disk-intensive. Running the maintenance operation during high-use times will result in performance degradation.