Setting maintenance mode on a node
Use maintenance mode to perform diagnostic tests, maintenance,
or tuning on a node without disrupting incoming traffic to that node
in a production environment.
Before you begin
You can set maintenance mode on a node that is represented
in the administrative console. To view the nodes that are configured,
click .
You
can use maintenance mode when you route requests with on demand routers
(ODR) or proxy servers. If you are using a Web server to route requests,
then maintenance mode is not recognized.
About this task
When a node is in the running state, the dynamic operations
environment considers that node to be available for servicing application
requests. When problems occur, you must perform diagnostics, maintenance,
or tuning on the node. Use maintenance mode to stop routing
traffic to the node while you determine the problem.
Procedure
- Select the nodes for which you want to change the maintenance
mode. In the administrative console, click .
- Select the maintenance mode.
- Maintenance mode: Immediately moves the node to maintenance
mode. Any existing requests on the node are completed. Any new requests
are routed to nodes that are not in maintenance mode.
- Maintenance immediate stop: Stops all of the processes
on the node and immediately moves the node and all the servers running
on the node to maintenance mode, without serving the remaining requests
on the node. The node and all the servers on the node are in maintenance
mode after the node and servers stop. The nodes and servers continue
to be in maintenance mode when you restart the node and servers on
the node.
- Normal: Moves the node out of maintenance mode, and the
node begins to serve requests from the ODR.
- Click Set mode.
Results
HTTP traffic is no longer routed to the nodes that you
have in maintenance mode.
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