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 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, Minimum, and Maximum
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, Minimum, and Maximum
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
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