Creating a Topic

Scenario

Prerequisites

Procedure

1. Log in to the console.
2. Click in the upper left corner to select a region.
   Note

   Select the region where your RocketMQ instance is located.

3. Click and choose Application > Distributed Message Service for RocketMQ to open the console of DMS for RocketMQ.
4. Click a RocketMQ instance to go to the instance details page.
5. In the navigation pane, choose Topics.
6. Click Create Topic.
7. Configure the topic name and other parameters by referring to Table 1 or Table 2.

   Table 1 Topic parameters (RocketMQ 4.8.0)

   Parameter	Description
   Topic Name	Name of the topic. A topic name must meet the following requirements: Contains 3 to 64 characters. Contains only letters, digits, percent signs (%), vertical bars (|), hyphens (-), and underscores (_). Cannot start with rmq_sys_. Cannot be the same as the following strings: TBW102 SCHEDULE_TOPIC_XXXX BenchmarkTest RMQ_SYS_TRANS_HALF_TOPIC RMQ_SYS_TRACE_TOPIC RMQ_SYS_TRANS_OP_HALF_TOPIC TRANS_CHECK_MAX_TIME_TOPIC SELF_TEST_TOPIC OFFSET_MOVED_EVENT The topic name must be unique. Otherwise, the topic cannot be created. Once the topic is created, you cannot modify its name. NOTE: A percent (%) or vertical bar (|) contained in a topic name will be converted to an underscore (_) by Cloud Eye. For example, if a topic name is test%01, it will be displayed as test_01 on Cloud Eye.
   Permission	Topic permission, which can be publish/subscribe, publish, or subscribe.
   Brokers	Specify the broker to create the topic on, and the number of queues in the topic. If the instance is deployed on multiple brokers, click Add to add more brokers and specify queues.
   Description	Topic description. 0–200 characters

   Table 2 Topic parameters (RocketMQ 5.x)

   Parameter	Description
   Topic Name	Name of the topic. A topic name must meet the following requirements: Contains 3 to 64 characters. Contains only letters, digits, percent signs (%), vertical bars (|), hyphens (-), and underscores (_). Cannot start with rmq_sys_. Cannot be the same as the following strings: TBW102 SCHEDULE_TOPIC_XXXX BenchmarkTest RMQ_SYS_TRANS_HALF_TOPIC RMQ_SYS_TRACE_TOPIC RMQ_SYS_TRANS_OP_HALF_TOPIC TRANS_CHECK_MAX_TIME_TOPIC SELF_TEST_TOPIC OFFSET_MOVED_EVENT The topic name must be unique. Otherwise, the topic cannot be created. Once the topic is created, you cannot modify its name.
   Message Type	Options: Normal, Ordered, Scheduled, and Transactional.
   Description	Topic description. 0–200 characters

   Figure 1 Creating a topic (RocketMQ 4.8.0)

   
   

   Figure 2 Creating a topic (RocketMQ 5.x)

   
   

8. Click OK.