Network I/O metrics Storage capacity metrics Detailed volume metrics

Volume metrics

Your Amazon FSx for NetApp ONTAP file system can have one or more volumes that store your data. Each of these volumes has a set of CloudWatch metrics, classified as either Volume metrics or Detailed volume metrics.

Volume metrics are per-volume performance and storage metrics that take two dimensions, FileSystemId and VolumeId. FileSystemId maps to the file system that the volume belongs to.
Detailed volume metrics are per-storage-tier metrics that measure storage consumption per tier with the StorageTier dimension (with possible values of SSD and StandardCapacityPool) and per data type with the DataType dimension (with possible values of User, Snapshot, and Other). These metrics have the FileSystemId, VolumeId, StorageTier, and DataType dimensions.

Network I/O metrics

All of these metrics take two dimensions, FileSystemId and VolumeId.

Metric	Description
`DataReadBytes`	The number of bytes (network I/O) read from the volume by clients. The `Sum` statistic is the total number of bytes associated with read operations during the specified period. To calculate the average throughput (bytes per second) for a period, divide the `Sum` statistic by the number of seconds in the specified period. Units: Bytes Valid statistics: `Sum`
`DataWriteBytes`	The number of bytes (network I/O) written to the volume by clients. The `Sum` statistic is the total number of bytes associated with write operations during the specified period. To calculate the average throughput (bytes per second) for a period, divide the `Sum` statistic by the number of seconds in the specified period. Units: Bytes Valid statistics: `Sum`
`DataReadOperations`	The number of read operations (network I/O) on the volume by clients. The `Sum` statistic is the total number of read operations during the specified period. To calculate the average read operations per second for a period, divide the `Sum` statistic by the number of seconds in the specified period. Units: Count Valid statistics: `Sum`
`DataWriteOperations`	The number of write operations (network I/O) on the volume by clients. The `Sum` statistic is the total number of write operations during the specified period. To calculate the average write operations per second for a period, divide the `Sum` statistic by the number of seconds in the specified period. Units: Count Valid statistics: `Sum`
`MetadataOperations`	The number of I/O operations (network I/O) from metadata activities by clients to the volume. The `Sum` statistic is the total number of metadata operations during the specified period. To calculate the average metadata operations per second for a period, divide the `Sum` statistic by the number of seconds in the specified period. Units: Count Valid statistics: `Sum`
`DataReadOperationTime`	The sum of total time spent within the volume for read operations (network I/O) from clients accessing data in the volume. The `Sum` statistic is the total number of seconds spent by read operations during the specified period. To calculate the average read latency for a period, divide the `Sum` statistic by the `Sum` of the `DataReadOperations` metric over the same period. Units: Seconds Valid statistics: `Sum`
`DataWriteOperationTime`	The sum of total time spent within the volume for fulfilling write operations (network I/O) from clients accessing data in the volume. The `Sum` statistic is the total number of seconds spent by write operations during the specified period. To calculate the average write latency for a period, divide the `Sum` statistic by the `Sum` of the `DataWriteOperations` metric over the same period. Units: Seconds Valid statistics: `Sum`
`MetadataOperationTime`	The sum of total time spent within the volume for fulfilling metadata operations (network I/O) from clients that are accessing data in the volume. The `Sum` statistic is the total number of seconds spent by read operations during the specified period. To calculate the average latency for a period, divide the `Sum` statistic by the `Sum` of the `MetadataOperations` over the same period. Units: Seconds Valid statistics: `Sum`
`CapacityPoolReadBytes`	The number of bytes read (network I/O) from the volume's capacity pool tier. To ensure data integrity, ONTAP performs a read operation on the capacity pool immediately after performing a write operation. The `Sum` statistic is the total number of bytes read from the volume's capacity pool tier over a specified period. To calculate capacity pool bytes per second, divide the `Sum` statistic by the seconds in a specified period. Units: Bytes Valid statistics: `Sum`
`CapacityPoolReadOperations`	The number of read operations (network I/O) from the volume's capacity pool tier. This translates to a capacity pool read request. To ensure data integrity, ONTAP performs a read operation on the capacity pool immediately after performing a write operation. The `Sum` statistic is the total number of read operations from the volume's capacity pool tier over a specified period. To calculate capacity pool requests per second, divide the `Sum` statistic by the seconds in a specified period. Units: Count Valid statistics: `Sum`
`CapacityPoolWriteBytes`	The number of bytes written (network I/O) to the volume's capacity pool tier. To ensure data integrity, ONTAP performs a read operation on the capacity pool immediately after performing a write operation. The `Sum` statistic is the total number of bytes written to the volume's capacity pool tier over a specified period. To calculate capacity pool bytes per second, divide the `Sum` statistic by the seconds in a specified period. Units: Bytes Valid statistics: `Sum`
`CapacityPoolWriteOperations`	The number of write operations (network I/O) to the volume from the capacity pool tier. This translates to a write request. To ensure data integrity, ONTAP performs a read operation on the capacity pool immediately after performing a write operation. The `Sum` statistic is the total number of write operations to the volume's capacity pool tier over a specified period. To calculate capacity pool requests per second, divide the `Sum` statistic by the seconds in a specified period. Units: Count Valid statistics: `Sum`

Storage capacity metrics

All of these metrics take two dimensions, FileSystemId and VolumeId.

Metric	Description
`StorageCapacity`	The size of the volume in bytes. Units: Bytes Valid statistics: `Maximum`
`StorageUsed`	The used logical storage capacity of the volume. Units: Bytes Valid statistics: `Average`
`StorageCapacityUtilization`	The storage capacity utilization of the volume. Units: Percent Valid statistics: `Average`
`FilesUsed`	The used files (number of files or inodes) on the volume. Units: Count Valid statistics: `Average`
`FilesCapacity`	The total number of inodes that can be created on the volume. Units: Count Valid statistics: `Maximum`

Detailed volume metrics

Detailed volume metrics take more dimensions than volume metrics, enabling more granular measurements of your data. All detailed volume metrics have the dimensions FileSystemId, VolumeId, StorageTier, and DataType.

The StorageTier dimension indicates the storage tier that the metric measures, with possible values of All, SSD, and StandardCapacityPool.
The DataType dimension indicates the type of data that the metric measures, with possible values of All, User, Snapshot, and Other.

The following table defines what the StorageUsed metric measures for the listed dimensions.

Metric Description

Metric	Description
`StorageUsed`	The amount of logical space used, in bytes. This metric measures different types of space consumption depending on the dimensions used with this metric. When setting `StorageTier` to `SSD` or `StandardCapacityPool`, and setting `DataType` to `All`, this metric measures the logical space usage for this volume for your SSD and capacity pool tiers, respectively. When setting the `DataType` dimension to `User`, `Snapshot`, or `Other`, and setting `StorageTier` to `All`, this metric measures the logical space usage for each respective type of data. The `Snapshot` data consumption includes the snapshot reserve, which is 5% of the volume's size by default. Units: Bytes Valid statistics: `Average`, `Minimum`, and `Maximum`
`StorageCapacityUtilization`	The percentage of the volume's used physical disk space. Units: Percent Valid statistics: `Maximum`

StorageUsed

The amount of logical space used, in bytes. This metric measures different types of space consumption depending on the dimensions used with this metric. When setting StorageTier to SSD or StandardCapacityPool, and setting DataType to All, this metric measures the logical space usage for this volume for your SSD and capacity pool tiers, respectively. When setting the DataType dimension to User, Snapshot, or Other, and setting StorageTier to All, this metric measures the logical space usage for each respective type of data. The Snapshot data consumption includes the snapshot reserve, which is 5% of the volume's size by default.

Units: Bytes

Valid statistics: Average, Minimum, and Maximum

StorageCapacityUtilization

The percentage of the volume's used physical disk space.

Units: Percent

Valid statistics: Maximum

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Second-generation file system metrics

Monitoring EMS events