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Cloud Native Message Engine

Topic management

Create topic

A Topic is a message topic. Both message production and consumption are centered around the Topic. This topic describes how to create a Topic.

Prerequisites

An instance is the resource entity that stores Topics. You must create an instance before creating a Topic. For information about how to create an instance, see Create BMQ Instance.

Operation steps

In the top menu bar, select the target project and region.

In the left navigation pane, select BMQ Instance, click the target instance name, and access the instance details page.

On the instance details page, select the Topic Management tab, and then click Create Topic.

In the Create Topic dialog box, set the Topic name, number of partitions, message retention period, and other parameters, and then click Create.

Parameters	Description
Topic name	Enter the Topic name. It can only contain lowercase English letters, digits, underscores (_), and hyphens (-), with a length of 3 to 128 characters.
Description	Enter the description for the Topic. The length must be between 0 and 128 characters.
No. of partitions	Enter the number of partitions. The default is 12. The number of remaining available partitions is displayed below the input box.
Message retention period	The duration for which message data is stored in the Topic. The default is consistent with the global message retention period set for the instance, but it can also be adjusted independently with hourly granularity. The supported retention range is 1 to 336 hours (14 days).

Last updated: 2026.01.26 15:39:55