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Tencent Cloud Distributed Cache (Redis OSS-Compatible)

DocumentationTencent Cloud Distributed Cache (Redis OSS-Compatible)Operation GuideBackup and RestorationOverview

Overview

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Last updated: 2026-08-10 16:53:54
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No system can completely avoid failures, and some catastrophic damages can even directly threaten a company's data assets. To ensure data security and business continuity, Tencent Cloud Distributed Cache provides you with a comprehensive, multi-tiered backup and recovery solution. This solution covers three key areas: data backup, data restoration, and data security. It continuously retains instance data through automated and manual backups. When data anomalies occur, it supports restoring data to a new instance via instance cloning or data flashback. Furthermore, it supports encrypted storage of backup files to strictly prevent data leakage and meet security and compliance requirements.

Data Backup

Distributed Cache supports both automated and manual backups. It also provides backup file download addresses for both the internal and public networks.
Function
Explanation and Description
Operations
Automatic Backup
By default, a full data backup will be performed every day between 02:00 AM and 08:00 AM. In order to avoid increasing the processing burden on the master database, the backup data comes from replica nodes. You can flexibly configure the start time period of automatic backup tasks based on your conditions. You can see the daily backup data in
Manual Backup
In addition to the backup files periodically generated by the system, Distributed Cache also supports initiating manual backup tasks at any time to immediately perform data backup, meeting the needs of temporary or emergency backup scenarios.
Backup File
The backup list will display all the backup files of the instance and backup information. Tencent Cloud Distributed Cache provides two backup download addresses: private network and public network, and you can choose the one that best suits your needs.
Public network download: You can download backup data from any location with Internet access. The public network download feature is enabled by default. You can disable it selectively based on your scenario.
Private network download: To prevent database backup data from being exfiltrated, Tencent Cloud Distributed Cache allows you to download backup files from a specific server within a private network that you authorize. The private network download address does not support cross-Region downloads. Downloads are only allowed within the Region where the instance resides.
Configuring Backup File Download Method
Downloading Backup Files

Data Recovery

When data anomalies occur, you can quickly restore data by cloning an instance or using data flashback. Both methods restore data to a brand new instance, without affecting the normal operation of the original instance.
Function
Explanation and Description
Operations
Instance Clone
Tencent Cloud Distributed Cache supports the instance clone feature, which creates a complete new instance based on the current instance. The instance data is consistent with the backup file. You can use the clone feature to analyze historical data, or achieve rollback by modifying IP addresses and swapping the IPs of the cloned new instance and the original instance.
Cloning Redis Edition Instances
Cloning Memcached Edition Instances

Data Security

Tencent Cloud Distributed Cache supports encrypted storage of backup files. This ensures the static security of backup data and meets compliance requirements.
Function
Explanation and Description
Operations
Backup Encryption
To meet the compliance requirements for static data encryption, Distributed Cache supports encrypting backup files. After this feature is enabled, the system uses the AES-256-CBC algorithm combined with an envelope encryption mechanism to complete encryption before backup files are written to storage. Even if backup files are obtained without authorization, they cannot be decrypted and restored without the key. Backup encryption supports two modes: Tencent Cloud-provided keys and user-defined keys (KMS). It can be dynamically enabled or disabled and only takes effect on newly generated backup files after it is enabled.

Billing Overview

Tencent Cloud Distributed Cache backup space can be used for free currently. Follow-up backup space billing will be notified in advance.
Previous Topic: Accessing Multi-AZ Deployed InstancesNext Topic: Configure Backup Rules

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