You can monitor the storage usage and performance of File Storage NAS (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 file systems.
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?
Capacity metrics
Capacity monitoring data is generated in real time and may not be the same as the usage data recorded in your bills. 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 of monitoring data
Monitoring data is retained for 90 days. After the retention period expires, the monitoring 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 a General-purpose NAS file system (excluding the IA storage class) | bytes | The volume of the data that is stored in a file system within a specified period of time. The value does not include the volume of the data that is stored in the IA storage class. |
SecondaryAlignedSize | Data volume of the IA storage class | bytes | The volume of the data that is stored in the IA storage class within a specified period of time after the lifecycle management feature is enabled for a file system. |
ExtremeCapacity | Total storage space of an Extreme NAS file system | bytes | The total capacity of an Extreme NAS file system within a specified period of time. |
ExtremeCapacityUsed | Data volume of an Extreme NAS file system | bytes | The volume of data that is stored in an Extreme NAS file system within a specified period of time. |
ExtremeInodeLimit | Maximum number of files in an Extreme NAS file system | N/A | The maximum number of files that can be created in an Extreme NAS file system within a specified period of time. |
ExtremeInodeUsed | Number of used files in an Extreme NAS file system | N/A | The number of files that have been created in an Extreme NAS file system within a specified period of time. |
RecycleSecondaryAlignedSize | Volume of IA data in the recycle bin | bytes | The volume of IA data that is stored in the recycle bin of a file system within a specified period of time. |
RecycleAlignedSize | Data volume of General-purpose NAS recycle bin (excluding the IA storage class) | bytes | The volume of the data that is stored in the recycle bin of a file system within a specified period of time. The value does not include the volume of the data that is stored in the IA storage class. |
FileCount | Number of files | N/A | The number of files in a file system, excluding folders. |
OfflineReadQuantity | Read traffic of the IA storage class | bytes | The read traffic that is generated when you access data in the IA storage class after the lifecycle management feature is enabled. |
OfflineWriteQuantity | Write traffic of the IA storage class | bytes | The write traffic that is generated when you access data in the IA storage class 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 within a specified period of time. |
IopsWrite | Write IOPS | requests/s | The average write IOPS of a file system within a specified period of time. |
ThruputRead | Read throughput | bytes/s | The average read throughput per second of a file system within a specified period of time. |
ThruputWrite | Write throughput | bytes/s | The average write throughput per second of a file system within a specified period of time. |
LatencyRead | Read latency | ms | The average read latency per millisecond of a file system within a specific period of time. |
LatencyWrite | Write latency | ms | The average write latency per millisecond of a file system within a specific period of time. |
QpsMeta | Metadata QPS | requests/s | The average number of times that a file system requests metadata per second within a specific period of time. |
Alert rules
You can configure alert rules for various metrics in the CloudMonitor console. If the metric value of a resource meets the alert condition, CloudMonitor automatically sends notifications to the specified recipients. The following table describes the alert severity, notification methods, and alert condition that you can configure for alert rules.
Alert severity | Notification method | Alert condition |
Critical | Phone call, text message, email, and 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, and DingTalk chatbot | |
Info | Email and DingTalk chatbot |