Edition Differences

**Table 1** Functions
Function		Specifications
Management scale	Maximum number of application component instances in a region	5,000
Management scale	Maximum number of instances supported by a component	200
Microservice	Microservice engine	The number of microservice engines that can be created depends on the engine type and the number of VMs in the AZ where the microservice engine is located. Each AZ can contain a maximum of 50 VMs. A cluster-deployed microservice engine consumes five VMs.
	Java microservice development SDK	Supported
	Spring Cloud microservice access
	Registry center
	Configuration center
	Real-time dashboard
	Load balancing
	Rate limiting
	Service degradation
	Fault tolerance
	Circuit breaker
	Fault injection
	Blacklist and whitelist
Application lifecycle management	Multi-language application management (Java, PHP, Python, Node.js, Tomcat, and Docker)	Supported
	Application lifecycle management (auto scaling, upgrade, rollback, start, stop, restart, and deletion)
	Basic application monitoring (running status, CPU, memory, and disk usage)
	Container-based deployment. Java, PHP, Python, Node.js, Tomcat, and Docker are supported.
	Access control
	Application domain name management
	Auto scaling
	Event analysis
	Log analysis
	Threshold rules
Deployment source management	Docker image package management	Supported
Deployment source management	Repository permission management	Supported
Application operations management	Log storage and search	1 TB/month; storage duration: 30 days
	Log analysis	500 GB
	API call (log data query)	10 GB/month
	Host monitoring	200 VMs; storage duration: 1 year
	Metrics in real-time monitoring	2000
	Custom metrics	500
	API call (metrics query)	5,000,000 times/month
	Events and alarms	500,000 records/moth; storage duration: 30 days
	Intelligent threshold rules	50

CSE Instance Specifications

Microservice engines have professional and exclusive editions.

Professional microservice engine: Cloud Service Engine (CSE) is a free experience engine provided by ServiceStage. You can use a professional engine to experience all product capabilities of ServiceStage, such as service governance and configuration management. Engines are shared by all tenants; however, the performance may be affected by other tenants. A professional engine cannot be upgraded to the exclusive edition.
Exclusive microservice engine: Exclusive engines are commercial engines that manage large-scale microservice applications. You can select different engine specifications based on service requirements, and specifications cannot be changed. Exclusive engines are exclusively used; therefore, the performance is not affected by tenants.

The following describes the maximum number of instances supported by CSE.