Help Center/ Cloud Eye/ Service Overview/ Basic Concepts
Updated on 2025-09-10 GMT+08:00
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Basic Concepts

The following concepts are central to your understanding and use of Cloud Eye:

Metrics

A metric refers to a quantized value of a resource dimension on the cloud platform, such as the ECS CPU usage and memory usage. A metric is a time-dependent variable that generates a certain amount of monitoring data over time. It helps you understand the changes over a specific period of time. For details about how to view cloud service monitoring data, see Viewing a Cloud Service Dashboard. For details about the metrics supported by Cloud Eye, see Cloud Product Metrics.

Rollup

Rollup is the process in which Cloud Eye calculates the average, maximum, minimum, sum, or variance value based on the sample raw data reported by each cloud service in specific periods. The calculation period is called rollup period. Cloud Eye supports the following rollup periods: 5 minutes, 20 minutes, 1 hour, 4 hours, and 24 hours. For details, see What Is Rollup?

Dashboards

Monitoring dashboards allow you to view monitoring data of metrics of different services and dimensions. You can use dashboards to display metrics of key services in a centralized way, get an overview of the service statuses, and use monitoring data for troubleshooting. For more information, see Overview.

Topics

A topic is used to publish messages and subscribe to notifications in SMN. Topics provide you with one-to-many publish subscription and message notification functions. You can send messages to different types of endpoints with just one message request. Cloud Eye uses SMN to notify you of cloud service resource changes, enabling you to track the cloud service status in a timely manner. For details, see Creating a Topic.

Alarm Rules

The status of an alarm rule changes based on the threshold you set. Cloud Eye notifies you by email, SMS message, HTTP/HTTPS request, FunctionGraph (function), FunctionGraph (workflow), WeCom, DingTalk, Lark, or WeLinkemail or HTTP/HTTPS request, so you can handle faults quickly and prevent service interruptions. For details, see Creating an Alarm Rule.

Alarm Templates

Alarm templates contain one or more alarm rules for specific services. The templates help you create alarm rules for multiple cloud services, improving O&M efficiency. For more information, see Creating a Custom Alarm or Event Template.

Projects

A project is used to group and isolate OpenStack resources, such as the compute, storage, and network resources. A project can either be a department or a project team. You can use an account to create multiple projects. For details, see Projects.