Automatic Topic Creation indicates that a topic will be automatically created when a message is produced in or consumed from a topic that does not exist. By default, the topic has parameters listed in Table 1.
After you change the value of the log.retention.hours (retention period), default.replication.factor (replica quantity), or num.partitions (partition quantity) parameter, the value will be used in later topics that are automatically created. For example, assume that num.partitions is changed to 5, an automatically created topic has parameters listed in Table 1.
Parameter |
Default Value |
Modified Value |
|---|---|---|
Partitions |
3 |
5 |
Replicas |
3 |
3 |
Aging Time (h) |
72 |
72 |
Synchronous Replication |
Disabled |
Disabled |
Synchronous Flushing |
Disabled |
Disabled |
Message Timestamp |
CreateTime |
CreateTime |
Max. Message Size (bytes) |
10,485,760 |
10,485,760 |
Procedure
- Log in to the console.
- Click
in the upper left corner to select a region.
Select the region where your Kafka instance is located.
- Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
- Click the desired Kafka instance to view its details.
- In the Instance Information area, click
or 
next to Automatic Topic Creation. The Confirm dialog box is displayed. Enabling or disabling automatic topic creation may cause instance restarts.
- Click OK.
You can view the execution status of the task on the Background Tasks page.