Cloud Message Queue

A high-performance distributed message queue service

Tencent Cloud Cloud Message Queue (CMQ) is a distributed message queue service featuring a reliable message-based async communication mechanism that enables message receiving/sending among different applications deployed in a distributed manner (or different components of the same application) and stores the messages in reliable and valid CMQ queues to prevent message loss. It supports multi-process simultaneous read-write so that message sending and receiving do not interfere with each other, eliminating the need for the applications or components to run continuously.

Benefits

High Performance

CMQ can efficiently send/receive and push tens of millions of messages and retain an unlimited number of messages. It features an extremely high throughput and can process over 100,000 queries per second (QPS) with one single cluster, fully meeting the messaging needs of your businesses.

High Availability

When each message is returned to the user, CMQ writes three copies of the message data to different physical servers so that when one of the servers fails, the backend data replication mechanism can quickly migrate the data. With three backups of user data available at any time, CMQ can guarantee up to 99.999999% reliability and 99.95% business continuity. In addition, CMQ adopts the Raft algorithm to achieve strong data consistency.

High Scalability

The underlying system automatically scales the number of queues and queue storage capacity according to business size without affecting the user experience. Currently, this is available in multiple regions such as Beijing, Shanghai and Guangzhou. With smooth scale-out, a single CMQ cluster boasts over 100,000 QPS and a single CMQ queue can logically provide messaging services across multiple clusters.

Security and Reliability

CMQ supports HTTPS-based secure access and utilizes Tencent Cloud's multi-dimensional security protection to defend against network attacks and protect the privacy of your businesses. Plus, it supports managing master/sub-accounts and collaborator accounts for fine-grained resource access control.

Easy OPS-free Usage

CMQ provides APIs and SDKs for various languages such as Java and C++ to reduce your development costs and facilitate cloudification. It features multi-dimensional monitoring and alarms, eliminating your concerns over the OPS of underlying resources and enabling you to instead focus on business development.

Features

Async Communication Protocol

After sending a message to the message queue, the message sender can immediately return without needing to wait for the recipient's response. The message will be saved in the queue until it is retrieved by the recipient. The sending and processing of the message are completely async.

Improved Reliability

Traditionally, a message request could fail due to extended wait time. However, with CMQ, if the recipient is unavailable when a message is sent, CMQ will retain the message until it is successfully delivered to the recipient.

Process Decoupling

CMQ helps reduce the degree of coupling between two processes. As long as the message format stays unchanged, no changes will be made for the sender even if the recipient's API, location or configuration changes. Moreover, the message sender does not have to know who the recipient is, clarifying the system design. In contrast, if a remote procedure call (RPC) or socket connection is used between processes, when one party's API, IP or port changes, the other party must modify the request configuration.

Message Routing

A direct connection is not required between the sender and the recipient because CMQ guarantees that the message can be routed from the former to the latter. Message routing is even available for two services that are not easily interconnectable.

Multi-terminal Interconnection

Messages can be sent or received among multiple business terminals, and CMQ controls the availability of messages via message status.

Diversity

Queues can be configured independently and do not need to be identical. Queues can also be customized for different business scenarios. For example, the properties of a queue that has a relatively long message processing time can be optimized.

Scenarios

The benefits of CMQ are well-reflected in the distributed transactions of WeChat's red packet system. The WeChat architecture team has integrated CMQ into the red packet system to reduce its distributed transactions overhead. The CMQ red packet queue ensures the reliable delivery and storage of red packet messages. If the funds fail to be credited, the account system will continue pulling from the CMQ to retry the update operation, ensuring that the crediting message will never get lost and avoiding drawbacks such as rollback upon crediting failure and frequent database polling. Learn more.

Permanently Available Messages (WeChat)
High Scalability
Intra-city Disaster Recovery