Amazon FSx for OpenZFS metrics and dimensions

Amazon FSx publishes the metrics described in the following tables in the AWS/FSx namespace in Amazon CloudWatch for all FSx for OpenZFS file systems:

FSx for OpenZFS network I/O metrics

The AWS/FSx namespace includes the following network I/O metrics.

Metric	Description
DataReadBytes	The number of bytes for read operations for clients that access the file system. Unit: Bytes Valid statistic: Sum
DataWriteBytes	The number of bytes for write operations for clients that access the file system. Unit: Bytes Valid statistic: Sum
DataReadOperations	The number of read operations for clients that access the file system. Unit: Count Valid statistic: Sum
DataWriteOperations	The number of write operations for clients that access the file system. Unit: Count Valid statistic: Sum
ClientConnections	The number of active connections between clients and the file server. Unit: Count Valid statistics: Average, Maximum
MetadataOperations	The number of metadata operations for clients that access the file system. Unit: Count Valid statistic: Sum
NfsBadCalls	The number of calls rejected by the NFS server remote procedure call (RPC) mechanism. Unit: Count Valid statistic: Sum

FSx for OpenZFS file server metrics

The AWS/FSx namespace includes the following file server metrics.

Metric	Description
NetworkThroughputUtilization	The network throughput for clients that access the file system, as a percentage of the provisioned limit. For Multi-AZ file systems, this metric includes replication traffic. Unit: Percent Valid statistics: Average, Maximum
CPUUtilization	The percentage utilization of your file server’s CPU resources. Unit: Percent Valid statistics: Average, Maximum
FileServerDiskThroughputUtilization	The disk throughput between your file server and its storage volumes. Listed as a percentage of the provisioned limit, which is determined by throughput capacity. Unit: Percent Valid statistics: Average, Maximum
FileServerDiskThroughputBalance	The percentage of available burst credits for disk throughput between your file server and its storage volumes. Unit: Percent Valid statistics: Average, Minimum
FileServerDiskIopsUtilization	The disk IOPS between your file server and storage volumes, as a percentage of the provisioned limit, which is determined by throughput capacity. Unit: Percent Valid statistics: Average, Maximum
FileServerDiskIopsBalance	The percentage of available burst credits for disk IOPS between your file server and its storage volumes. Unit: Percent Valid statistics: Average, Minimum
MemoryUtilization	The percentage of your file server’s memory resources that are utilized. Unit: Percent Valid statistics: Average, Maximum
FileServerCacheHitRatio	The percentage of cache hits. For Single-AZ 2 (non-HA and HA) file systems, this metric reports the cache hit ratio for both the in-memory (ARC) and NVMe (L2ARC) caches. For Single-AZ 1 (non-HA and HA) file systems, this metric reports only the cache hit ratio for the ARC cache. Unit: Percent Valid statistics: Average, Minimum

FSx for OpenZFS disk metrics

The AWS/FSx namespace includes the following disk metrics.

Metric	Description
DiskReadBytes	The number of bytes for read operations that access storage volumes. Unit: Bytes Valid statistic: Sum
DiskWriteBytes	The number of bytes for write operations that access storage volumes. Unit: Bytes Valid statistic: Sum
DiskReadOperations	The number of read operations for the file server that accesses storage volumes. Unit: Count Valid statistic: Sum
DiskWriteOperations	The number of write operations for the file server that accesses storage volumes. Unit: Count Valid statistic: Sum
DiskThroughputBalance	The percentage of available burst credits for disk throughput for the storage volumes. Unit: Percent Valid statistics: Average, Minimum
DiskIopsUtilization	The disk IOPS between your file server and storage volumes, as a percentage of the provisioned IOPS limit that has been determined by the storage volumes. Unit: Percent Valid statistics: Average, Maximum

FSx for OpenZFS storage capacity metrics

The AWS/FSx namespace includes the following storage capacity metrics.

Metric	Description
StorageCapacity	The total storage capacity, equal to the sum of used and available storage capacity. Unit: Bytes Valid statistics: Average, Minimum
UsedStorageCapacity	The amount of storage that's used. Unit: Bytes Valid statistics: Average, Minimum
CompressionRatio	The ratio of compressed storage usage to uncompressed storage usage. Valid statistics: Average, Minimum

FSx for OpenZFS dimensions

FSx for OpenZFS provides additional dimensions to further refine the metrics listed in the previous table. FSx for OpenZFS metrics use the FSx namespace and provide metrics at the file system or volume granularity by using the FileSystemId or VolumeId.

Dimension	Description
FileSystemId	This dimension filters the metrics that you request to an individual file system.
VolumeId	This dimension filters the metrics that you request to an individual volume within a file system. This dimension must be used in combination with FileSystemId.
CacheType	This dimension filters the metrics that you request by the type of cache used, either ARC for in-memory caching or L2ARC for SSD and NVMe caching. This dimension must be used in combination with FileSystemId.
DataType	This dimension filters the metrics that you requested to a specific type of stored data. Metrics with DataType set to Snapshot report information about the snapshots within the volume. Metrics without a DataType dimension report aggregated information from the volume, which includes any child volumes and snapshots within the volume.

FSx for OpenZFS metrics use the FSx namespace and provide metrics for the dimensions that are listed in the table above.