Managing Storm Topologies¶
Scenario¶
You can manage Storm topologies on the Storm web UI. Users in the storm group can manage only the topology tasks submitted by themselves, while users in the stormadmin group can manage all topology tasks.
Procedure¶
For details about how to access the Storm WebUI, see Accessing the Storm Web UI.
In the Topology summary area, click the desired topology.
Use options in Topology actions to manage the Storm topology.
Activating a topology
Click Activate to activate the topology.
Deactivating a topology
Click Deactivate to deactivate the topology.
Re-deploying a topology
Click Rebalance and specify the wait time (in seconds) of re-deployment. Generally, if the number of nodes in a cluster changes, the topology can be re-deployed to maximize resource usage.
Deleting a topology
Click Kill and specify the wait time (in seconds) of the deletion.
Starting or stopping sampling messages
Click Debug. In the dialog box displayed, specify the percentage of the sampled data volume. For example, if the value is set to 10, 10% of data is sampled.
To stop sampling, click Stop Debug.
Note
This function is available only if the sampling function is enabled when the topology is submitted. For details about querying data processing information, see Querying Storm Topology Logs.
Modifying the topology log level
Click Change Log Level to specify a new log level.
Displaying a topology
In the Topology Visualization area, click Show Visualization to visualize the topology.