RocketMQ fixes problems and optimizes performance based on the open-source version and independently develops a middleware that features low cost, high reliability, and high performance, and supports operation monitoring.

Problems for Using Open-source RocketMQ

Incomplete functions: The functions are relatively simple and cannot effectively support different application scenarios, such as message queries and the auto data deletion policy.
Poor maintainability: Without monitoring and O&M, it is difficult to quickly locate and solve problems such as message accumulation and queue blocking.
Low reliability: It does not support master-slave failover and may encounter single points of failures, and therefore cannot ensure the HA of services.

Improvements of DMS RocketMQ

Ø HA and High Reliability:

Auto master-slave failover and auto pull ensure HA. You can use the message deletion policy to ensure service availability or data security in different scenarios.

Ø Improved Maintainability:

You can monitor the running status by producer, consumer, data node, and queue to quickly locate problems.

It provides visual monitoring, configuration, and management interfaces to automate testing for rapid iteration.

Ø New Features:

You can query and track messages.

You can re-encapsulate the SDK to simplify applications, and use the hash algorithm to realize locally ordered production and consumption of messages.

Open-Source and Self-Built Comparison Items

Comparison Items	Open-Source and Self-Built	Distributed Message Service (RocketMQ)
Automatic deployment	Automatic deployment is not supported. Experts are required for deployment, and O&M.	It supports fully managed PaaS, and one-click auto deployment requiring no machine resources, out-of-the-box, on-demand usage and elastic scalability.
O&M Monitoring	Lack of corresponding monitoring and O&M capabilities.	You can use visual monitoring at multiple dimensions to quickly locate and handle problems.
Enhanced Functions	The simple functions cannot support multiple scenarios.	It has diverse functions and allows you to customize functions such as message retry, message query, message trace query, and auto data cleaning.
Delayed/Scheduled Messages	Only 18 delay levels are supported. The longest delay is two hours.	The second-level message delivery delay can be customized. The longest delay is 40 days.
ACL Access Control	Complex access control	Flexible configurations with one click to apply.

Distributed Message Service RocketMQ

Comparison with Open-Source Versions