# Source: https://docs.datadoghq.com/ddsql_reference/data_directory/aws/aws.efs_file_system.dataset.md

---
title: EFS File System
description: Datadog, the leading service for cloud-scale monitoring.
breadcrumbs: Docs > DDSQL Reference > Data Directory > EFS File System
---

# EFS File System

Amazon EFS File System is a fully managed, scalable, and elastic file storage service for use with AWS Cloud services and on-premises resources. It provides a simple interface to create and configure file systems that can be accessed concurrently from multiple Amazon EC2 instances. EFS automatically grows and shrinks as files are added or removed, offering high availability and durability across multiple Availability Zones. It is ideal for workloads that require shared file storage with high throughput and low latency, such as content management, web serving, and data analytics.

```
aws.efs_file_system
```

## Fields

| Title                           | ID   | Type       | Data Type                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | Description |
| ------------------------------- | ---- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----------- |
| _key                            | core | string     |
| account_id                      | core | string     |
| availability_zone_id            | core | string     | The unique and consistent identifier of the Availability Zone in which the file system is located, and is valid only for One Zone file systems. For example, use1-az1 is an Availability Zone ID for the us-east-1 Amazon Web Services Region, and it has the same location in every Amazon Web Services account.                                                                                                                                                                                                                                                                                                                                            |
| availability_zone_name          | core | string     | Describes the Amazon Web Services Availability Zone in which the file system is located, and is valid only for One Zone file systems. For more information, see Using EFS storage classes in the Amazon EFS User Guide.                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| creation_time                   | core | timestamp  | The time that the file system was created, in seconds (since 1970-01-01T00:00:00Z).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| creation_token                  | core | string     | The opaque string specified in the request.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| encrypted                       | core | bool       | A Boolean value that, if true, indicates that the file system is encrypted.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| file_system_arn                 | core | string     | The Amazon Resource Name (ARN) for the EFS file system, in the format arn:aws:elasticfilesystem:region:account-id:file-system/file-system-id . Example with sample data: arn:aws:elasticfilesystem:us-west-2:1111333322228888:file-system/fs-01234567                                                                                                                                                                                                                                                                                                                                                                                                        |
| file_system_id                  | core | string     | The ID of the file system, assigned by Amazon EFS.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| file_system_protection          | core | json       | Describes the protection on the file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| kms_key_id                      | core | string     | The ID of an KMS key used to protect the encrypted file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| life_cycle_state                | core | string     | The lifecycle phase of the file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| lifecycle_policies              | core | json       | An array of lifecycle management policies. EFS supports a maximum of one policy per file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| name                            | core | string     | You can add tags to a file system, including a Name tag. For more information, see CreateFileSystem. If the file system has a Name tag, Amazon EFS returns the value in this field.                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| number_of_mount_targets         | core | int64      | The current number of mount targets that the file system has. For more information, see CreateMountTarget.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| owner_id                        | core | string     | The Amazon Web Services account that created the file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| performance_mode                | core | string     | The performance mode of the file system.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| provisioned_throughput_in_mibps | core | float64    | The amount of provisioned throughput, measured in MiBps, for the file system. Valid for file systems using ThroughputMode set to provisioned.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| size_in_bytes                   | core | json       | The latest known metered size (in bytes) of data stored in the file system, in its Value field, and the time at which that size was determined in its Timestamp field. The Timestamp value is the integer number of seconds since 1970-01-01T00:00:00Z. The SizeInBytes value doesn't represent the size of a consistent snapshot of the file system, but it is eventually consistent when there are no writes to the file system. That is, SizeInBytes represents actual size only if the file system is not modified for a period longer than a couple of hours. Otherwise, the value is not the exact size that the file system was at any point in time. |
| tags                            | core | hstore_csv |
| throughput_mode                 | core | string     | Displays the file system's throughput mode. For more information, see Throughput modes in the Amazon EFS User Guide.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |