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    PolarDB:ModifyBackupPolicy

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    PolarDB:ModifyBackupPolicy

    Last Updated:Oct 30, 2025

    You can call this operation to modify the automatic backup policy for a PolarDB cluster.

    Operation description

    Note

    You can also modify the automatic backup policy for a PolarDB cluster in the console. For more information, see Backup settings.

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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

    polardb:ModifyBackupPolicy

    update

    *dbcluster

    acs:polardb:{#regionId}:{#accountId}:dbcluster/{#dbclusterId}

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    DBClusterId

    string

    Yes

    The cluster ID.

    Note

    Call the DescribeDBClusters operation to query the information about all clusters in a specific region, including cluster IDs.

    pc-bp13wz9586voc****
    PreferredBackupTime

    string

    No

    The time window to perform an automatic backup. Specify the time in the hh:mmZ-hh:mmZ format and in UTC. The time window must be one hour and start on the hour. For example, 14:00Z-15:00Z.

    15:00Z-16:00Z
    PreferredBackupPeriod

    string

    No

    The backup cycle. Valid values:

    • Monday

    • Tuesday

    • Wednesday

    • Thursday

    • Friday

    • Saturday

    • Sunday

    Note

      • Select at least two days. Separate multiple values with commas (,).

      • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    Monday,Tuesday
    DataLevel1BackupRetentionPeriod

    string

    No

    The retention period of level-1 backups. Valid values: 3 to 14. Unit: day.

    Note

    • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    3
    DataLevel2BackupRetentionPeriod

    string

    No

    The retention period of level-2 backups. Valid values:

    • 0: Disables the level-2 backup feature.

    • 30 to 7300: The retention period of level-2 backups in days.

    • -1: Level-2 backups are permanently retained.

    Note

      • When you create a cluster, the default value is 0, which disables the level-2 backup feature.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    0
    BackupRetentionPolicyOnClusterDeletion

    string

    No

    Specifies whether to retain backups when you delete the cluster.

    • ALL: Permanently retains all backups.

    • LATEST: Permanently retains the last backup.

    • NONE: Does not retain backup sets.

    Note

    The default value is NONE.

    NONE
    BackupFrequency

    string

    No

    The backup frequency. Valid values:

    • Normal (default): Standard backup. The system backs up the cluster once a day.

    • 2/24H: High-frequency backup. The system backs up the cluster every 2 hours.

    • 3/24H: High-frequency backup. The system backs up the cluster every 3 hours.

    • 4/24H: High-frequency backup. The system backs up the cluster every 4 hours.

    Note

      • If you enable high-frequency backup, all backups that are completed within 24 hours are retained. For backups that are more than 24 hours old, the system retains only the first backup that is completed after 00:00 each day. The other backups are deleted.

      • If you enable high-frequency backup, the PreferredBackupPeriod parameter is automatically set to all days of the week (from Monday to Sunday).

      • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    Normal
    DataLevel1BackupFrequency

    string

    No

    The backup frequency. Valid values:

    • Normal (default): Standard backup. The system backs up the cluster once a day.

    • 2/24H: High-frequency backup. The system backs up the cluster every 2 hours.

    • 3/24H: High-frequency backup. The system backs up the cluster every 3 hours.

    • 4/24H: High-frequency backup. The system backs up the cluster every 4 hours.

    Note

      • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

      • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    Normal
    DataLevel1BackupTime

    string

    No

    The time window to perform an automatic backup. Specify the time in the hh:mmZ-hh:mmZ format and in UTC. The time window must be one hour and start on the hour. For example, 14:00Z-15:00Z.

    Note

    • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

    • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

    15:00Z-16:00Z
    DataLevel1BackupPeriod

    string

    No

    The level-1 backup cycle. Valid values:

    • Monday

    • Tuesday

    • Wednesday

    • Thursday

    • Friday

    • Saturday

    • Sunday

    Note

      • Select at least two days. Separate multiple values with commas (,).

      • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

      • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    Monday,Tuesday
    DataLevel2BackupPeriod

    string

    No

    The level-2 backup cycle. Valid values:

    • Monday

    • Tuesday

    • Wednesday

    • Thursday

    • Friday

    • Saturday

    • Sunday

    Note

      • Select at least two days. Separate multiple values with commas (,).

      • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

      • This parameter is not supported if the region where your PolarDB for MySQL cluster is located supports the cross-region backup feature. For more information about the regions that support cross-region backup, see Overview.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    Monday,Tuesday
    DataLevel2BackupAnotherRegionRegion

    string

    No

    The destination region for the cross-region level-2 backup. For more information about the regions that support cross-region backup, see Overview.

    Note

    • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    cn-hangzhou
    DataLevel2BackupAnotherRegionRetentionPeriod

    string

    No

    The retention period of the cross-region level-2 backup. Valid values:

    • 0: Disables the cross-region level-2 backup feature.

    • 30 to 7300: The retention period of the cross-region level-2 backup in days.

    • -1: The cross-region level-2 backups are permanently retained.

    Note

      • When you create a cluster, the default value is 0, which disables the cross-region level-2 backup feature.

      • After you enable the advanced backup feature, this parameter is no longer effective. Use the AdvancedDataPolicies parameter instead.

    30
    BackupPolicyLevel

    string

    No

    The level of the backup policy. Valid values:

    • Normal: Standard backup

    • Advanced: Advanced backup

    Note

      • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

      • Check the `AdvancedPolicyOption` parameter in the response of the DescribeBackupPolicy operation to determine if the cluster supports advanced backup. If the cluster supports advanced backup, request this feature in Advanced backup settings.

      • After you enable advanced backup, you cannot switch back to standard backup.

    Normal
    AdvancedDataPolicies

    array<object>

    No

    The advanced backup policy.

    Note

      • This parameter is not supported by PolarDB for PostgreSQL (compatible with Oracle) and PolarDB for PostgreSQL.

      • This parameter is supported only for clusters for which `BackupPolicyLevel` is set to `Advanced`.

    object

    No

    ActionType

    string

    No

    The operation type. Valid values:

    • CREATE: Create

    • UPDATE: Update

    • DELETE: Delete

    CREATE
    OnlyPreserveOneEachHour

    boolean

    No

    The retention policy for hourly backups. Valid values:

    • true: Retains only the earliest backup set of each hour for backups that are more than one hour old.

    • false: Retains all backup sets.

    Note

    This parameter cannot be modified. The value is fixed to `true`.

    true
    RetentionValue

    string

    No

    The number of days to retain the backup.

    7
    BakType

    string

    No

    The backup type. Valid values:

    • F: Full backup

    Note

    This parameter cannot be modified. The value is fixed to `F`.

    F
    FilterKey

    string

    No

    The scheduling type. Valid values:

    • dayOfWeek: Weekly schedule

    • dayOfMonth: Monthly schedule

    • dayOfYear: Yearly schedule

    • backupInterval: Fixed interval schedule

    Note

    This parameter is required only when `FilterType` is set to crontab.

    dayOfWeek
    FilterValue

    string

    No

    The backup cycle.

    1,2,3,4,5,6,7
    DestType

    string

    No

    The destination type for the backup policy. Valid values:

    • level1: Level-1 backup

    • level2: Level-2 backup

    • level2Cross: Cross-region level-2 backup

    level2
    FilterType

    string

    No

    The filter type for the advanced policy. Valid values:

    • crontab: Recurring schedule

    • event: Event-based schedule

    crontab
    SrcRegion

    string

    No

    The source region of the backup policy.

    cn-shanghai
    AutoCreated

    boolean

    No

    Indicates whether the backup policy is automatically generated by the system.

    Note

    This parameter is automatically generated. Do not specify this parameter.

    false
    SrcType

    string

    No

    The source type of the backup policy. Valid values:

    • db: Database cluster

    • level1: Level-1 backup

    • level2: Level-2 backup

    • level2Cross: Cross-region level-2 backup

    level1
    OnlyPreserveOneEachDay

    boolean

    No

    The retention policy for backups that are more than 24 hours old.

    • true: Retains only the first backup set of the day for backups that are more than 24 hours old.

    • false: Retains all backups.

    true
    DumpAction

    string

    No

    The method to convert a level-1 backup to a level-2 backup. Valid values:

    • copy: Copy

    copy
    PolicyId

    string

    No

    The ID of the backup policy. Call the DescribeBackupPolicy operation to view the ID.

    71930ac2e9f15e41615e10627c******

    DestRegion

    string

    No

    The destination region of the backup policy.

    cn-beijing
    RetentionType

    string

    No

    The type of the retention period for the backup set. Valid values:

    • never: Never expires

    • delay: Expires after a specified number of days.

    delay

    Response elements

    Element

    Type

    Description

    Example

    object

    RequestId

    string

    The request ID.

    C5A5DF0E-5968-4DC1-882E-AC2FE7******

    Examples

    Success response

    JSON format

    {
  "RequestId": "C5A5DF0E-5968-4DC1-882E-AC2FE7******"
}

    Error codes

    HTTP status code

    Error code

    Error message

    Description
    400 InvalidDataLevel1BackupRetentionPeriod.Malformed The specified parameter DataLevel1BackupRetentionPeriod is not valid. The specified DataLevel1BackupRetentionPeriod parameter is invalid.
    400 InvalidDataLevel2BackupRetentionPeriod.Malformed The specified parameter DataLevel2BackupRetentionPeriod is not valid. The specified DataLevel2BackupRetentionPeriod parameter is invalid.
    400 InvalidBackupRetentionPeriod.Malformed The specified parameter BackupRetentionPeriod is not valid. The specified BackupRetentionPeriod parameter is invalid.
    400 InvalidBackupFrequency.Malformed The specified parameter BackupFrequency is not valid. The specified BackupFrequency parameter is invalid.
    400 InvalidPreferredBackupPeriod.Malformed The specified parameter PreferredBackupPeriod is not valid. The specified PreferredBackupPeriod parameter is invalid.
    400 InvalidDataLevel2BackupPeriod.Malformed The specified parameter DataLevel2BackupPeriod is not valid. The specified DataLevel2BackupPeriod parameter is invalid.
    400 InvalidDataLevel1BackupPeriod.Malformed The specified parameter DataLevel1BackupPeriod is not valid. The specified DataLevel1BackupPeriod parameter is invalid.
    400 InvalidPreferredBackupTime.Malformed The specified parameter PreferredBackupTime is not valid. The specified PreferredBackupTime parameter is invalid.
    400 InvalidDataLevel1BackupTime.Malformed The specified parameter DataLevel1BackupTime is not valid. The specified DataLevel1BackupTime parameter is invalid.
    400 InvalidDataLevel1BackupFrequency.Malformed The specified parameter DataLevel1BackupFrequency is not valid. The specified DataLevel1BackupFrequency parameter is invalid.
    400 InvalidDataLevel2AnotherRegionRegion.NotFound The specified parameter DataLevel2BackupAnotherRegionRegion does not found. The specified DataLevel2BackupAnotherRegionRegion parameter cannot be found.
    400 InvalidDataLevel2AnotherRegionBackupRetentionPeriod.Malformed The specified parameter DataLevel2BackupAnotherRegionRetentionPeriod is not valid. The specified DataLevel2BackupAnotherRegionRetentionPeriod parameter is invalid.
    403 IncorrectBackupPolicy Current DB type does not support low frequency backupPolicy operation. Infrequent access backup operations are not supported by the current database type.
    404 InvalidDBCluster.NotFound The DBClusterId provided does not exist in our records. The specified DBClusterId parameter does not exist in the current record.
    404 InvalidDBClusterId.NotFound The DBClusterId provided does not exist in our records. The specified DBClusterId parameter does not exist in the current record.
    404 InvalidParam new archiveBackup policy already exists. dumpretention parameter cannot used alone An archive backup policy has been created. The dumpretation parameter cannot be used alone.
    404 InvalidDBClusterId.Malformed The specified parameter DBClusterId is not valid. The specified DBClusterId parameter is invalid.

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.