ApsaraDB for ClickHouse:Data recovery

How it works

ApsaraDB for ClickHouse supports data recovery at the instance level only, not for individual databases or tables. All data from the source instance's backup set is restored to a new instance, known as a clone instance.

Prerequisites

Billing

Procedure

1. Log on to the ApsaraDB for ClickHouse console. In the upper-left corner, select the instance's region.

2. On the Clusters page, select the tab for the corresponding edition, and then click the target instance ID.

3. In the navigation pane on the left, click Backup and Restoration.

4. On the Backup and Restoration page, find the desired backup set and click Data Recovery in the Actions column.

5. On the Clone Instance page, review the source instance's configuration and configure the clone instance.

   Community-compatible edition

   Parameter	Description
   Cluster Type	The edition of the source instance.
   Cloned Data Source Cluster	The source instance ID.
   Clone Source Type	The data source type for the clone instance.
   Backup Set	The start time of the backup set. Note This parameter is displayed only if the following conditions are met: Clone Source Type is set to Backup Set. The Current Instance Kernel Version is not the latest version.
   Region	The region of the clone instance. This is locked to the source instance's region.
   Zone	The zone of the clone instance.
   Network Type	Only Virtual Private Cloud (VPC) is supported.
   VPC	The VPC for the clone instance.
   VSwitch	The vSwitch for the clone instance.
   Current Instance Kernel Version	If Clone Source Type is set to restore from a backup set, this parameter shows the kernel version of the clone instance, which matches the source instance and cannot be changed. If Clone Source Type is set to clone from a real-time replica, this parameter shows the kernel version of the source instance and cannot be changed.
   Target Instance Kernel Version	The kernel version of the clone instance. Note This parameter is available only if Clone Source Type is set to clone from a real-time replica.
   Replica Configuration	The replica configuration of the clone instance, inherited from the source instance. This cannot be changed. High-availability: Each node contains two replicas. If one replica becomes unavailable, the other replica in the same shard can continue to provide service. single-replica: Each node has only one replica. If this replica becomes unavailable, the entire instance becomes unavailable until the replica fully recovers.
   Specification	The node specifications for the clone instance.
   Nodes	The number of nodes in the clone instance, inherited from the source instance. This cannot be changed.
   Storage Type	The storage type of the clone instance. ESSD: Enhanced SSDs (ESSDs) are ultra-high-performance cloud disks based on a new-generation distributed block storage architecture. Performance levels: ESSD PL3 > ESSD PL2 > ESSD PL1 > ESSD PL0. Ultra Disk: A cost-effective cloud disk with moderate random read/write performance and high reliability.
   Encryption Type	The encryption type for the clone instance. No encryption: The disk is not encrypted. Disk encryption: Encrypts the entire data disk at the block storage level. You must also select an encryption key.
   Storage Capacity	The storage capacity of the clone instance, inherited from the source instance. This cannot be changed.

   Enterprise edition

   Parameter	Description
   Cluster Type	The edition of the source instance.
   Cloned Data Source Cluster	The source instance ID.
   Clone Source Type	The data source type, which is fixed to "Restore from backup set".
   Backup Set	The start time of the backup set.
   Deployment Method	The deployment method for the clone instance.
   Region	The region of the clone instance. This is locked to the source instance's region.
   Zone	The zone of the clone instance. If you select the multi-zone deployment method, you must select three zones for the instance.
   Network Type	Only Virtual Private Cloud (VPC) is supported.
   VPC	The VPC for the clone instance.
   VSwitch	The vSwitch for the clone instance.
   Maximum CCU	The upper limit of CCU (ClickHouse Compute Unit) for the clone instance.
   Minimum CCU	The lower limit of CCUs for the clone instance.

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