Help Center/ Distributed Message Service/ Service Overview/ Notes and Constraints
Updated on 2022-02-24 GMT+08:00
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Notes and Constraints

If you want to change the default restrictions, see Quotas.

Item

Default Restriction

Modifiable

Queues

A maximum of 30 queues can be created under a project.

Yes

Consumer groups

A maximum of 3 consumer groups can be created in a queue.

Yes

RabbitMQ instances

A maximum of 100 RabbitMQ instances can be created under a project.

Yes

Kafka instances

A maximum of 100 Kafka instances can be created under a project.

Yes
Whether you can access DMS over a public network depends on the DMS queue type and access mode.
  • RESTful API

    Public access is supported. You can access standard and advanced queues over a public network by using a RESTful API.

  • TCP API

    Public access is not supported. To access DMS by using a TCP API, you must deploy your message client on an Elastic Cloud Server (ECS) to which no elastic IP address is bound.

  • Open-source Kafka API

    Public access is supported. Alternatively, you can access DMS from an ECS to which no elastic IP address is bound. Note that the DMS endpoints are different in these two access modes.

For details on how to access DMS by using a RESTful API, see the DMS API Reference. For details on how to access DMS by using the other two types of APIs, see the DMS Developer Guide.