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 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. 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 metrics of different services and dimensions. You can use monitoring panels to display metrics of key services in a centralized way, get an overview of the service running status, and use monitoring data for 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 just one message request. Cloud Eye uses SMN to notify you of cloud service resource changes, enabling you to track the running status of cloud services in a timely manner.
Alarm Rules
You can create alarm rules to set thresholds for cloud service metrics. When the status (such as Alarm and OK) of the alarm rule changes, Cloud Eye notifies you by sending emails, or by sending HTTP/HTTPS messages to servers.
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