Creates a snapshot.


  • Only Extreme NAS file systems support the snapshot feature.
  • You can create a maximum of 128 snapshots for a file system.
  • The compute node on which a file system is mounted must function as expected. Otherwise, you cannot create a snapshot for the file system.
  • You can create only one snapshot for a file system at a time.
  • If the file system expires when a snapshot is being created, the file system is released and the snapshot is deleted.
  • A short-term compromise in I/O performance of a file system may occur when you create a snapshot for the file system. We recommend that you create snapshots during off-peak hours.
  • A snapshot is a backup of a file system at a specific point in time. After you create a snapshot, incremental data that is generated in the file system will not be synchronized to the snapshot.
  • Manually created snapshots will not be deleted until 15 days after the service is suspended due to an overdue payment. We recommend that you delete unnecessary snapshots at regular intervals to prevent extra fees incurred by the snapshots.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer automatically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes CreateSnapshot

The operation that you want to perform.

Set the value to CreateSnapshot.

FileSystemId String Yes Extreme-01dd****

The ID of the file system.

SnapshotName String No FinanceJoshua

The name of the snapshot.


  • The name must be 2 to 128 characters in length. The name must start with a letter and cannot start with http:// or https://.
  • The name can contain digits, colons (:), underscores (_), and hyphens (-).
  • The name cannot start with auto because a snapshot whose name starts with auto is recognized as an automatic snapshot.
Description String No FinanceDepet

The description of the snapshot.


  • The description must be 2 to 256 characters in length.
  • The description cannot start with http:// or https://.
  • The value of this parameter is empty by default.
RetentionDays Integer No 30

The retention period of the snapshot.

Unit: days.

Valid values:

  • -1: the default value. Auto snapshots are permanently retained. After the number of auto snapshots exceeds the upper limit, the earliest auto snapshot is automatically deleted.
  • 1 to 65536: Auto snapshots are retained for the specified days. After the retention period of auto snapshots expires, the auto snapshots are automatically deleted.

Response parameters

Parameter Type Example Description
RequestId String 473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

The ID of the request.

SnapshotId String s-extreme-snapsho****

The ID of the snapshot.


Sample requests

http(s)://[Endpoint]/? Action=CreateSnapshot
&<Common request parameters>

Sample success responses

XML format


JSON format

    "SnapshotId": "s-extreme-snapsho****",
    "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****"

Error codes

For a list of error codes, visit the API Error Center.