Change time

January 1, 2026 00:00:00 - February 1, 2026 00:00:00

Change content

To improve data protection flexibility and automated O&M capabilities, the Alibaba Cloud ECS snapshot service will be upgraded soon. After the upgrade, a single disk can be associated with up to 10 automatic snapshot policies simultaneously to meet the backup requirements of multiple scenarios.

This upgrade will be launched in batches in each region from January 1, 2026. The upgrade is expected to be completed in all regions within one month. During the upgrade, your existing workloads will not be affected, and the original snapshot policy will continue to work properly. For details, please refer to the official website document: "Apply multiple automatic snapshot policies to a single disk"

Change Impact

To support multi-policy associating, the following changes will occur in the following OpenAPI operations. We recommend evaluating and adapt them in a timely manner:

1. ApplyAutoSnapshotPolicy apply automatic snapshot policies to disks

• Change content: When this API is called, if an automatic snapshot policy is already attached to the target disk, the system will attach an additional policy instead of replacing the existing one. Snapshots will be created according to all associated policies. We recommend reviewing and adjusting your policies promptly to avoid unexpected snapshot charges.
• Quota limit: A maximum of 10 automatic snapshot policies can be attached to a single disk. If the quota is exceeded, this API will return the error code: QuotaExceed.AppliedAutoSnapshotPolicyQuota

1. CancelAutoSnapshotPolicy cancel an automatic snapshot policy for a disk

• New parameter autoSnapshotPolicyId:
  • If this parameter is specified, only the corresponding policy is canceled;
  • If not specified:
    • When a disk is associated with only one policy, the policy is automatically canceled;
    • If a disk is associated with ≥ 2 policies, the operation fails and the error code: OperationDenied.TooManyAutoSnapshotPolicies is returned.
• Suggestion: In multi-policy scenarios, explicitly pass in the autoSnapshotPolicyId for precise control.

1. DescribeAutoSnapshotPolicyAssociations new API

• Query all disks associated with an automatic snapshot policy, or query all automatic snapshot policies associated with a disk

Recommendations

This OpenAPI change may cause disks to be bound to multiple automatic snapshot policies and then create more snapshots. If you use OpenAPI or SDK to manage automatic snapshot policies, we recommend that you adapt OpenAPI before the upgrade date arrives to avoid additional snapshot fees due to behavior changes.

If you have any questions, please feel free to contact us by submitting a support ticket