When you create an index, TREX automatically creates a corresponding queue and assigns the queue to a master queue server. If you are using backup queue servers, TREX also assigns a backup queue server to the queue.
You can change these assignments if necessary. You may want to do this if you need to remove a host from the distributed system and assign the queues to other servers first.
Prerequisites
You are using centralized data storage.
Procedure
Function | Description |
---|---|
Move master here |
Assigns another master queue server to the queue. |
Switch master/backup |
Switches the master and backup queue servers. The master queue server is then used as the backup queue server for this queue (and vice versa). |
Remove this backup |
Removes the assignment of queue to backup queue server. |
Add backup here |
Assigns another backup queue server to the queue. |
The functions only change the assignment of queue to server. The queues are not physically moved.
You can also change the assignments if the currently assigned master or backup queue server is active at that point in time. The currently assigned master or backup server completes its current activity before the change takes effect.