Coordinator Failure

If the current coordinator node fails, or must be shut down for maintenance, the entire multiplex is placed in a read-only state. In this state, you can query the existing IQ data but not modify it.

To re-establish read-write capabilities, you must promote another server to be the coordinator. This operation is called manual failover.

• Designated Failover Node
  A multiplex requires a designated failover node to take over as coordinator if the current coordinator is not running.
• Requirements for Failover
  You must ensure that the former coordinator process is no longer running before attempting failover.
• Replacing the Coordinator with Sybase Central
  Make sure that the coordinator is really down before you replace it.
• Replacing the Coordinator from the Command Line
  Make sure that the coordinator is really down before you replace it.
• Replacing the Coordinator using Sybase Control Center
  If you prefer a web-based tool for multiplex failover, use Sybase Control Center.