Overview
Note:
To save the storage space, physical and logical backups in TencentDB for MySQL will be compressed with qpress and then packed with xbstream offered by Percona.
TencentDB for MySQL supports logical backup as described in Backing up Databases. In the console, you can manually create logical backup files of an entire instance or specified databases/tables and download them. This document describes how to manually restore data from logical backup files. The restoration method described in this document only applies to Linux.
Supported instance architectures: two-node or three-node MySQL
Directions
Step 1. Download the backup file
1. Log in to the TencentDB for MySQL console. In the instance list, click an instance ID or Manage in the Operation column to enter the instance management page. 2. On the Backup and Restoration > Data Backup List tab, locate the backup file to be downloaded and click Download in the Operation column.
3. We recommend that you copy the download link in the pop-up dialog box, log in to a (Linux) CVM instance in the same VPC as the TencentDB instance, and run the wget
command for download over the private network at a higher speed. For more information, see Customizing Linux CVM Configurations Note:
You can also click Download to download it directly. However, this may take a longer time.
wget
command format: wget -c 'backup file download address' -O custom filename.xb
Below is a sample:
wget -c 'https://mysql-database-backup-bj-118.cos.ap-beijing.myqcloud.com/12427%2Fmysql%2F42d-11ea-b887-6c0b82b%2Fdata%2Fautomatic-delete%2F2019-11-28%2Fautomatic%2Fxtrabackup%2Fbk_204_10385%2Fcdb-1pe7bexs_backup_20191128044644.xb?sign=q-sign-algorithm%3Dsha1%26q-ak%3D1%26q-sign-time%3D1574269%3B1575417469%26q-key-time%3D1575374269%3B1517469%26q-header-list%3D%26q-url-param-list%3D%26q-signature%3Dfb8fad13c4ed&response-content-disposition=attachment%3Bfilename%3D%2141731_backup_20191128044644.xb%22&response-content-type=application%2Foctet-stream' -O test0.xb
Step 2. Unpack the backup file
Unpack the backup file with xbstream.
Note:
Replace test0.xb
with your backup file.
The unpacking result is as shown below:
Step 3. Decompress the backup file
1. Download qpress by running the following command.
wget -d --user-agent="Mozilla/5.0 (Windows NT x.y; rv:10.0) Gecko/20100101 Firefox/10.0" https://docs-tencentdb-1256569818.cos.ap-guangzhou.myqcloud.com/qpress-11-linux-x64.tar
2. Extract the qpress binary files by running the following command.
tar -xf qpress-11-linux-x64.tar -C /usr/local/bin
source /etc/profile
3. Decompress the backup file with qpress.
qpress -d cdb-jp0zua5k_backup_20191202182218.sql.qp .
Note:
Find the backup file with .sql.qp
extension by decompression time and replace cdb-jp0zua5k_backup_20191202182218
with its filename.
The decompressing result is as shown below:
Step 4. Import the backup file into the target database
Import the .sql file into the target database by running the following command:
mysql -uroot -P3306 -h127.0.0.1 -p < cdb-jp0zua5k_backup_20191202182218.sql
Note:
This document takes importing into a local MySQL instance with port 3306 as an example. You can replace it as needed.
Replace cdb-jp0zua5k_backup_20191202182218.sql
with the .sql file extracted by qpress.
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