Basic Concepts
The following concepts are central to your understanding and use of Cloud Eye:
Metrics
Metrics are the core concept in Cloud Eye. 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 series of monitoring data over time. It helps you understand the metric changes over a specified period of time.
Rollup
Rollup is the process in which Cloud Eye calculates the average, maximum, minimum, sum, or variance value based on sample raw data reported by each cloud service in specific periods. The calculation period is called rollup period. Currently, Cloud Eye supports the following rollup periods: 5 minutes, 20 minutes, 1 hour, 4 hours, and 24 hours.
Monitoring Panels
Monitoring panels allow you to view monitoring data of custom metrics of different services and dimensions. It displays metrics of key services in a centralized way, so that you can get an overview of the service running status and check monitoring details when troubleshooting.
Topics
A topic is used to publish messages and subscribe to notifications. Topics provide you with one-to-many publish subscription and message notification functions. You can send messages to different types of endpoints with only one message request. With SMN, Cloud Eye uses various methods to notify you of cloud service resource changes, helping you track running status of cloud services in a timely manner.
Alarm Rules
In an alarm rule, you can set the threshold for a cloud service metric. When the status (such as Alarm and OK) of the alarm rule changes, Cloud Eye notifies you by sending emails, text messages, or by sending HTTP/HTTPS requests, avoiding service loss due to resource problems.
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