2016/06/28 - Amazon Elastic File System - 2 updated api methods
{'PerformanceMode': 'generalPurpose | maxIO'}
Creates a new, empty file system. The operation requires a creation token in the request that Amazon EFS uses to ensure idempotent creation (calling the operation with same creation token has no effect). If a file system does not currently exist that is owned by the caller's AWS account with the specified creation token, this operation does the following:
Creates a new, empty file system. The file system will have an Amazon EFS assigned ID, and an initial lifecycle state creating .
Returns with the description of the created file system.
Otherwise, this operation returns a FileSystemAlreadyExists error with the ID of the existing file system.
Note
For basic use cases, you can use a randomly generated UUID for the creation token.
The idempotent operation allows you to retry a CreateFileSystem call without risk of creating an extra file system. This can happen when an initial call fails in a way that leaves it uncertain whether or not a file system was actually created. An example might be that a transport level timeout occurred or your connection was reset. As long as you use the same creation token, if the initial call had succeeded in creating a file system, the client can learn of its existence from the FileSystemAlreadyExists error.
Note
The CreateFileSystem call returns while the file system's lifecycle state is still creating . You can check the file system creation status by calling the DescribeFileSystems operation, which among other things returns the file system state.
This operation also takes an optional PerformanceMode parameter that you choose for your file system. We recommend generalPurpose performance mode for most file systems. File systems using the maxIO performance mode can scale to higher levels of aggregate throughput than general purpose mode file systems, with a tradeoff of slightly higher latencies for most file operations. For more information, see Amazon EFS: Performance Modes .
After the file system is fully created, Amazon EFS sets its lifecycle state to available , at which point you can create one or more mount targets for the file system in your VPC. For more information, see CreateMountTarget . You mount your Amazon EFS file system on an EC2 instances in your VPC via the mount target. For more information, see Amazon EFS: How it Works .
This operation requires permissions for the elasticfilesystem:CreateFileSystem action.
Request Syntax
client.create_file_system(
CreationToken='string',
PerformanceMode='generalPurpose'|'maxIO'
)
string
[REQUIRED]
String of up to 64 ASCII characters. Amazon EFS uses this to ensure idempotent creation.
string
The PerformanceMode of the file system. We recommend generalPurpose performance mode for most file systems. File systems using the maxIO performance mode can scale to higher levels of aggregate throughput than general purpose mode file systems, with a tradeoff of slightly higher latencies for most file operations.
dict
Response Syntax
{
'OwnerId': 'string',
'CreationToken': 'string',
'FileSystemId': 'string',
'CreationTime': datetime(2015, 1, 1),
'LifeCycleState': 'creating'|'available'|'deleting'|'deleted',
'Name': 'string',
'NumberOfMountTargets': 123,
'SizeInBytes': {
'Value': 123,
'Timestamp': datetime(2015, 1, 1)
},
'PerformanceMode': 'generalPurpose'|'maxIO'
}
Response Structure
(dict) --
Description of the file system.
OwnerId (string) --
AWS account that created the file system. If the file system was created by an IAM user, the parent account to which the user belongs is the owner.
CreationToken (string) --
Opaque string specified in the request.
FileSystemId (string) --
ID of the file system, assigned by Amazon EFS.
CreationTime (datetime) --
Time that the file system was created, in seconds (since 1970-01-01T00:00:00Z).
LifeCycleState (string) --
Lifecycle phase of the file system.
Name (string) --
You can add tags to a file system, including a Name tag. For more information, see CreateTags . If the file system has a Name tag, Amazon EFS returns the value in this field.
NumberOfMountTargets (integer) --
Current number of mount targets that the file system has. For more information, see CreateMountTarget .
SizeInBytes (dict) --
Latest known metered size (in bytes) of data stored in the file system, in bytes, 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. Note that the value does not 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, the value will represent 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 the file system was at any instant in time.
Value (integer) --
Latest known metered size (in bytes) of data stored in the file system.
Timestamp (datetime) --
Time at which the size of data, returned in the Value field, was determined. The value is the integer number of seconds since 1970-01-01T00:00:00Z.
PerformanceMode (string) --
The PerformanceMode of the file system.
{'FileSystems': {'PerformanceMode': 'generalPurpose | maxIO'}}
Returns the description of a specific Amazon EFS file system if either the file system CreationToken or the FileSystemId is provided. Otherwise, it returns descriptions of all file systems owned by the caller's AWS account in the AWS Region of the endpoint that you're calling.
When retrieving all file system descriptions, you can optionally specify the MaxItems parameter to limit the number of descriptions in a response. If more file system descriptions remain, Amazon EFS returns a NextMarker , an opaque token, in the response. In this case, you should send a subsequent request with the Marker request parameter set to the value of NextMarker .
To retrieve a list of your file system descriptions, this operation is used in an iterative process, where DescribeFileSystems is called first without the Marker and then the operation continues to call it with the Marker parameter set to the value of the NextMarker from the previous response until the response has no NextMarker .
The implementation may return fewer than MaxItems file system descriptions while still including a NextMarker value.
The order of file systems returned in the response of one DescribeFileSystems call and the order of file systems returned across the responses of a multi-call iteration is unspecified.
This operation requires permissions for the elasticfilesystem:DescribeFileSystems action.
Request Syntax
client.describe_file_systems(
MaxItems=123,
Marker='string',
CreationToken='string',
FileSystemId='string'
)
integer
(Optional) Specifies the maximum number of file systems to return in the response (integer). This parameter value must be greater than 0. The number of items that Amazon EFS returns is the minimum of the MaxItems parameter specified in the request and the service's internal maximum number of items per page.
string
(Optional) Opaque pagination token returned from a previous DescribeFileSystems operation (String). If present, specifies to continue the list from where the returning call had left off.
string
(Optional) Restricts the list to the file system with this creation token (String). You specify a creation token when you create an Amazon EFS file system.
string
(Optional) ID of the file system whose description you want to retrieve (String).
dict
Response Syntax
{
'Marker': 'string',
'FileSystems': [
{
'OwnerId': 'string',
'CreationToken': 'string',
'FileSystemId': 'string',
'CreationTime': datetime(2015, 1, 1),
'LifeCycleState': 'creating'|'available'|'deleting'|'deleted',
'Name': 'string',
'NumberOfMountTargets': 123,
'SizeInBytes': {
'Value': 123,
'Timestamp': datetime(2015, 1, 1)
},
'PerformanceMode': 'generalPurpose'|'maxIO'
},
],
'NextMarker': 'string'
}
Response Structure
(dict) --
Marker (string) --
Present if provided by caller in the request (String).
FileSystems (list) --
Array of file system descriptions.
(dict) --
Description of the file system.
OwnerId (string) --
AWS account that created the file system. If the file system was created by an IAM user, the parent account to which the user belongs is the owner.
CreationToken (string) --
Opaque string specified in the request.
FileSystemId (string) --
ID of the file system, assigned by Amazon EFS.
CreationTime (datetime) --
Time that the file system was created, in seconds (since 1970-01-01T00:00:00Z).
LifeCycleState (string) --
Lifecycle phase of the file system.
Name (string) --
You can add tags to a file system, including a Name tag. For more information, see CreateTags . If the file system has a Name tag, Amazon EFS returns the value in this field.
NumberOfMountTargets (integer) --
Current number of mount targets that the file system has. For more information, see CreateMountTarget .
SizeInBytes (dict) --
Latest known metered size (in bytes) of data stored in the file system, in bytes, 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. Note that the value does not 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, the value will represent 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 the file system was at any instant in time.
Value (integer) --
Latest known metered size (in bytes) of data stored in the file system.
Timestamp (datetime) --
Time at which the size of data, returned in the Value field, was determined. The value is the integer number of seconds since 1970-01-01T00:00:00Z.
PerformanceMode (string) --
The PerformanceMode of the file system.
NextMarker (string) --
Present if there are more file systems than returned in the response (String). You can use the NextMarker in the subsequent request to fetch the descriptions.