Amazon Elastic File System

Amazon Elastic File System (EFS) provides serverless, fully elastic file storage so that you can share file data without provisioning or managing storage capacity and performance.

You must configure cloud connections to monitor this entity. See Set up Cisco AppDynamics Cloud Collectors to Monitor AWS.

Cisco Cloud Observability displays AWS entities on the Observe page. Metrics are displayed for specific entity instances in the list and detail views.

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Detail View

To display the detail view for an Amazon EFS instance:

Navigate to the Observe page.
Under Database & Storage, click AWS Elastic File Storages.
The list view now displays.
From the list, click an instance Name to display the detail view.
The detail view displays metrics, key performance indicators, and properties (attributes) related to the instance you selected.

Metrics and Key Performance Indicators

Cisco Cloud Observability displays the following metrics and key performance indicators (KPIs) for Amazon EFS. See Amazon CloudWatch metrics for Amazon EFS.

Display Name	Source Metric	Description
Client Connections (Count)	`ClientConnections`	The number of client connections to a file system. When using a standard client, there is one connection per mounted Amazon EC2 instance. To calculate the average `ClientConnections` for periods greater than one minute, divide the Sum statistic by the number of minutes in the period.
Percent IO Limit (%)	`PercentIOLimit`	Shows how close a file system is to reaching the I/O limit of the General Purpose performance mode. If this metric is frequently at 100%, consider moving your application to a file system using the Max I/O performance mode. This metric is only submitted for file systems using the General Purpose performance mode.
Burst Credit Balance (Bytes)	`BurstCreditBalance`	The number of burst credits that a file system has. Burst credits allow a file system to burst to throughput levels above a file system’s baseline level for periods of time. For more information, see Bursting Throughput mode. The `Minimum` statistic is the smallest burst credit balance for any minute during the period. The `Maximum` statistic is the largest burst credit balance for any minute during the period. The `Average` statistic is the average burst credit balance during the period.
Permitted Throughput (Bytes/Sec)	`PermittedThroughput`	The maximum amount of throughput that a file system can drive. For file systems in Bursting Throughput mode, this value is a function of the file system size and `BurstCreditBalance`. For file systems in Elastic Throughput mode, this value reflects the maximum write throughput of the file system. For file systems in Provisioned Throughput mode, if the amount of data stored in the EFS Standard storage class allows your file system to drive a higher throughput than you provisioned, this metric reflects the higher throughput instead of the provisioned amount. For more information, see Amazon EFS performance. The `Minimum` statistic is the smallest throughput permitted for any minute during the period. The `Maximum` statistic is the highest throughput permitted for any minute during the period. The `Average` statistic is the average throughput permitted during the period. Read operations are metered at one-third the rate of other operations.
Metered IO Bytes	`MeteredIOBytes`	The number of metered bytes for each file system operation, including data read, data write, and metadata operations, with read operations metered at one-third the rate of other operations. You can create a CloudWatch metric math expression that compares `MeteredIOBytes` to `PermittedThroughput`. If these values are equal, then you are consuming the entire amount of throughput allocated to your file system. In this situation, you might consider changing the file system's throughput mode to get higher throughput. The `Sum` statistic is the total number of metered bytes associated with all file system operations. The `Minimum` statistic is the size of the smallest operation during the period. The `Maximum` statistic is the size of the largest operation during the period. The `Average` statistic is the average size of an operation during the period. The `SampleCount` statistic provides a count of all operations.
Total IO Bytes	`TotalIOBytes`	The actual number of bytes for each file system operation, including data read, data write, and metadata operations. This is the actual amount that your application is driving, and not the throughput the file system is being metered at. It might be higher than the numbers shown in `PermittedThroughput`. The `Sum` statistic is the total number of bytes associated with all file system operations. The `Minimum` statistic is the size of the smallest operation during the period. The `Maximum` statistic is the size of the largest operation during the period. The `Average` statistic is the average size of an operation during the period. The `SampleCount` statistic provides a count of all operations. To calculate the average operations per second for a period, divide the `SampleCount` statistic by the number of seconds in the period. To calculate the average throughput (bytes per second) for a period, divide the Sum statistic by the number of seconds in the period.
Data IO Bytes	`DataReadIOBytes`	The number of bytes for each file system read operation. The `Sum` statistic is the total number of bytes associated with read operations. The `Minimum` statistic is the size of the smallest read operation during the period. The `Maximum` statistic is the size of the largest read operation during the period. The `Average` statistic is the average size of read operations during the period. The `SampleCount` statistic provides a count of read operations.
	`DataWriteIOBytes`	The number of bytes for each file system write operation. The `Sum` statistic is the total number of bytes associated with write operations. The `Minimum` statistic is the size of the smallest write operation during the period. The `Maximum` statistic is the size of the largest write operation during the period. The `Average` statistic is the average size of write operations during the period. The `SampleCount` statistic provides a count of write operations.
	`MetadataIOBytes`	The number of bytes for each metadata operation. The `Sum` statistic is the total number of bytes associated with metadata operations. The `Minimum` statistic is the size of the smallest metadata operation during the period. The `Maximum` statistic is the size of the largest metadata operation during the period. The `Average` statistic is the size of the average metadata operation during the period. The `SampleCount` statistic provides a count of metadata operations.
Storage Bytes	`StorageBytes`	The size of the file system in bytes, including the amount of data stored in the EFS Standard and EFS Standard–Infrequent Access (EFS Standard-IA) storage classes. This metric is emitted every 15 minutes to CloudWatch. For more information about storage classes, see EFS storage classes. The `StorageBytes` metric has three dimensions: `Total` is the latest known metered size (in bytes) of data stored in the file system, including both storage classes. `Standard` is the latest known metered size (in bytes) of data stored in the EFS Standard storage class. `IA` is the latest known metered size (in bytes) of data stored in the EFS Standard-IA storage class.

Properties (Attributes)

Cisco Cloud Observability displays the following properties for Amazon EFS.

Display Name	Property Name	Description
ARN	`aws.efs.arn`	The Amazon Resource Name (ARN) for the file system.
Performance Mode	`aws.efs.performance_mode`	The performance mode of the file system.
Throughput Mode	`aws.efs.throughput_mode`	The throughput mode for the file system.
Mount Targets	`aws.efs.mount_targets`	There are two throughput modes for the file system: bursting and provisioned.
Standard Storage Size	`aws.efs.storage_class.standard.size`	The latest known metered size (in bytes) of data stored in the Standard storage class.
Infrequent Storage Size	`aws.efs.storage_class.infrequent.size`	The latest known metered size (in bytes) of data stored in the Infrequent Access storage class.

Retention and Purge Time-To-Live (TTL)

For all cloud and infrastructure entities, the retention TTL is 180 minutes (3 hours) and the purge TTL is 525,600 minutes (365 days).

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