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    File Storage NAS:ModifyAutoSnapshotPolicy

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    File Storage NAS:ModifyAutoSnapshotPolicy

    Last Updated:Aug 28, 2026

    Modifies an automatic snapshot policy. After you modify an automatic snapshot policy that is applied to a file system, the modification immediately takes effect on subsequent snapshots created for the file system.

    Operation description

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    RAM authorization

    The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

    • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

    • API: The API that you can call to perform the action.

    • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

    • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

      • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

      • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

    • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

    • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

    Action

    Access level

    Resource type

    Condition key

    Dependent action

    nas:ModifyAutoSnapshotPolicy

    update

    *All Resource

    *

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    AutoSnapshotPolicyId

    string

    Yes

    The ID of the automatic snapshot policy. You can call the DescribeAutoSnapshotPolicies operation to query automatic snapshot policies.

    sp-extreme-233e6****
    AutoSnapshotPolicyName

    string

    No

    The name of the automatic snapshot policy. If you do not specify this parameter, the existing policy name is retained.

    Limits:

    • The name must be 2 to 128 characters in length.

    • The name must start with a letter.

    • The name can contain digits, letters, colons (:), underscores (_), and hyphens (-). The name cannot start with http:// or https://.

    FinanceJoshua
    RepeatWeekdays

    string

    No

    The days of a week on which automatic snapshots are created.

    Cycle: week.

    Valid values: 1 to 7. The value 1 indicates Monday. To create multiple automatic snapshots within a week, specify multiple days and separate them with commas (,). You can specify a maximum of seven days.

    1,7
    RetentionDays

    integer

    No

    The retention period of automatic snapshots.

    Unit: days.

    Valid values:

    • -1 (default): Automatic snapshots are permanently retained. After the number of automatic snapshots exceeds the upper limit, the earliest automatic snapshot is automatically deleted.

    • 1 to 65536: Automatic snapshots are retained for the specified number of days. After the retention period expires, the automatic snapshots are automatically deleted.

    30
    TimePoints

    string

    No

    The points in time at which automatic snapshots are created.

    Unit: hours.

    Valid values: 0 to 23. The values from 0 to 23 indicate a total of 24 hours from 00:00 to 23:00. For example, the value 1 indicates 01:00. To create multiple automatic snapshots within a day, specify multiple points in time and separate them with commas (,). You can specify a maximum of 24 points in time.

    0,1

    Response elements

    Element

    Type

    Description

    Example

    object

    RequestId

    string

    The request ID. Every response returns a unique request ID regardless of whether the request is successful.

    473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

    Examples

    Success response

    JSON format

    {
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****"
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.