You can monitor the usage of NAS file systems and view the monitoring data. You can configure alert rules for important metrics of NAS file systems. This way, you can receive notifications about exceptions and handle the exceptions at the earliest opportunity. This topic describes the metrics that are supported by NAS and the alert rules that can be configured for NAS.
Background information
CloudMonitor is a service that monitors Internet applications and Alibaba Cloud resources. You can use CloudMonitor to monitor the metrics of Alibaba Cloud resources and configure alert rules for specific metrics. This way, you can monitor the usage of your Alibaba Cloud resources and the status of your applications. You can also handle alerts at the earliest opportunity to ensure the availability of your applications. For more information, see What is CloudMonitor?
Storage usage metrics
Metric data for storage usage is generated in real time. You are not billed for the metric data. For information about how to view the billing and usage details of a file system, see View billing and usage details.
Performance metrics
- The values of the IOPS and metadata QPS metrics are integers. If the number of requests within the last minute is less than 60, 0 is displayed.
- If the charts show No data, your file system has not received requests from clients or you have not activated the corresponding services.
Retention policy for metric data
Metric data is retained for 90 days. After the retention period expires, the metric data is automatically cleared. The retention period starts when data is generated.
Metrics
The performance and capacity of NAS file systems are monitored by CloudMonitor in real time.
Capacity monitoring
| MetricName | Metric | Unit | Description |
|---|---|---|---|
| AlignedSize | Data volume of General-purpose NAS file systems (excluding IA storage media) | Bytes | The volume of the data that is stored in the file system within a specified period of time. The value does not include the volume of the data that is stored in Infrequent Access (IA) storage media. |
| SecondaryAlignedSize | Data volume of IA storage media | Bytes | The volume of the data that is stored in IA storage media within a specified period of time after the lifecycle management feature is enabled. |
| FileCount | Number of files | N/A | The number of files in the file system excluding folders. |
| OfflineReadQuantity | Read traffic of IA storage media | Bytes | The read traffic that is generated when you access data in an IA storage medium after the lifecycle management feature is enabled. |
| OfflineWriteQuantity | Write traffic of IA storage media | Bytes | The write traffic that is generated when you access data in an IA storage medium after the lifecycle management feature is enabled. |
Performance monitoring
| MetricName | Metric | Unit | Description |
|---|---|---|---|
| IopsRead | Read IOPS | Requests/s | The average read IOPS of a file system over a specified period of time. |
| IopsWrite | Write IOPS | Requests/s | The average write IOPS of a file system over a specified period of time. |
| ThruputRead | Read throughput | Bytes/s | The average read throughput per second of a file system over a specified period of time. |
| ThruputWrite | Write throughput | Bytes/s | The average write throughput per second of a file system over a specified period of time. |
| LatencyRead | Read latency | ms | The average read latency per millisecond of a file system over a specified period of time. |
| LatencyWrite | Write latency | ms | The average write latency per millisecond of a file system over a specified period of time. |
| QpsMeta | Metadata QPS | Requests/s | The average number of times that a file system requests metadata per second over a specified period of time. |
Alert rules
| Alert severity | Notification methods | Alert condition |
|---|---|---|
| Critical | Phone call + Text message + Email + DingTalk chatbot | The average value of the metric reaches the specified threshold for consecutive N cycles. You can configure the value of N based on the alert severity. Note The alert condition varies based on the type of the metric that is used. |
| Warning | Text message + Email + DingTalk chatbot | |
| Info | Email + DingTalk chatbot |