This topic describes the terms of CloudMonitor.

Term Description
site monitoring The feature used to monitor the availability of domain names and IP addresses. You can use detection points to send requests over the HTTP, ICMP, TCP, UDP, DNS, POP3, SMTP, or FTP protocol to the monitored domain names or IP addresses and receive the status codes and response time.
cloud service monitoring The feature that monitors multiple metrics of different cloud services, including ApsaraDB for RDS, Server Load Balancer (SLB), and Object Storage Service (OSS).
custom monitoring The feature that allows you to customize the metrics to monitor and use scripts to report monitoring data. This feature meets your requirements for business monitoring.
alert service The feature that allows you to set alert rules for site monitoring, cloud service monitoring, and custom monitoring. Alert notifications are sent when the monitoring data triggers alert rules.
metric The type of the monitoring data. CloudMonitor provides system metrics and allows you to customize metrics. For example, CloudMonitor provides two metrics for monitoring sites over the HTTP protocol, which are response time and status code. The metrics for monitoring Elastic Compute Service (ECS) instances include CPU usage and memory usage.
dimension The identifier that is used to locate a monitoring data entry of a metric. For example, you can use the instance ID and disk name dimensions to uniquely identify a monitoring data entry of the disk I/O metric. In custom monitoring, a dimension is a field.
alert rule The condition for triggering an alert. For example, you can set an alert rule to trigger an alert when the memory usage reaches or exceeds 50% for three consecutive times in 5 minutes.
mute period The interval during which alert notifications are not repeatedly sent for a metric, which is 24 hours by default. If a metric continually exceeds the threshold within 24 hours after an alert notification was sent for the metric, no more alert notifications will be sent for this metric in the 24-hour period.
alert contact The recipient of alert notifications.
alert group The group of one or more alert contacts. In alert rule configurations, alert notification recipients are alert groups, not alert contacts. The alert system sends alert notifications to alert contacts in the alert group by using the specified notification method when an alert is triggered.
notification method The method used to send alert notifications. You can use multiple notification methods, including text messages, TradeManager, emails, and Message Service (MNS) queues.