Help Center/ Elastic Volume Service/ User Guide/ Managing EVS Snapshots/ Using EVS Automatic Snapshots (for Standard Snapshots)/ Automatic Snapshot Overview
Updated on 2026-07-22 GMT+08:00
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Automatic Snapshot Overview

Scenarios

Safeguarding EVS disk data is essential during routine service operations. However, data stored on disks may be lost or corrupted due to user errors or system failures, resulting in service interruptions. Ensuring both data security and service continuity has therefore become a critical challenge. To mitigate these risks, you can configure automatic snapshot policies to create standard snapshots of your disks periodically. If data on your disk is lost or corrupted, you can quickly restore data from the snapshots.

Automatic snapshots are available only in certain regions. You can check the supported regions on the console.

Common Automatic Snapshot Operations

Operation

Description

Creating an Automatic Snapshot Policy

Protecting EVS disk data is critical during routine data management. However, snapshot creation may occasionally fail at scheduled times due to human error, resulting in service interruptions. Automatic snapshot policies allow you to define preset times at which standard snapshots are created automatically. This eliminates the risk of data loss if snapshots are not created manually. By using automatic snapshot policies, you can enhance data security and improve fault tolerance in service operations. This section describes how to create an automatic snapshot policy.

Applying and Removing an Automatic Snapshot Policy

During routine data protection, you may create snapshots for disks to prevent data loss. However, manually creating snapshots is time-consuming and can be easily overlooked. Therefore, it is recommended that you use automatic snapshot policies to schedule snapshot creation for your disks. After creating an automatic snapshot policy, you need to apply it to desired disks. Then, the system automatically creates standard snapshots for the disks. When automatic standard snapshots are no longer needed for certain disks, you can remove the policy from these disks to avoid resource wastes.

Modifying an Automatic Snapshot Policy

During routine data management, you may need to adjust how frequently snapshots are created based on service changes. This section describes how to modify an automatic snapshot policy. This ensures that the policy can adapt to service changes in a timely manner and improves the data management flexibility and efficiency.

Deleting an Automatic Snapshot Policy

In routine data management, automatic snapshot policies help you periodically back up important data to ensure data security. However, over time, unnecessary automatic snapshots can consume significant storage space and increase costs. It is recommended that you regularly delete automatic snapshots to prevent the accumulation of unwanted data. This section describes how to delete an automatic snapshot policy.

After an automatic snapshot policy is deleted, the system automatically removes it from the disks this policy previously applied to, and standard snapshots will not be automatically created for these disks.
Parent Topic: Using EVS Automatic Snapshots (for Standard Snapshots)