Today an old friend told me that his .xb mysql backup file extension can not be restored, or restore them only table no data, so I decided to try to conduct some backup and restore, in the online search, I have a document Tencent cloud, according to Tencent Come on cloud
First of all
Unpack backup file
- Since the compressed backup files to go through qpress, after xbstream package (xbstream as Percona a packing / unpacking tool), so after downloading the backup files, you should use xbstream to unpack it. xbstream Percona XtraBackup tool can be downloaded through the official website or download binary packages.
- Percona XtraBackup official website to download and install
select Percona XtraBackup 2.4.6 and above versions, installation instructions, see the official website of the document ,
After the election, the corresponding system version, select line installation
yum install https://repo.percona.com/yum/percona-release-latest.noarch.rpm
yum install percona-xtrabackup-24
In fact, the above two commands, the installation is complete
1. After installing XtraBackup, use xbstream command to unpack the backup file to the target directory.
xbstream -x -C / data <./test.xb / data file is restored, data name test.xb
2. Use qpress command to the target directory with all .qpfiles are decompressed at the end of it.
xtrabackup --decompress --target-dir=/data /data
3.Prepare backup file
After backup unzipped, you need to execute the following command to apply log operation.
xtrabackup --prepare --target-dir=/data
At this folder as follows
Modify the configuration file
Since version problems, please unzip the file backup-my.cnf following parameters commented out.
- innodb_checksum_algorithm
- innodb_log_checksum_algorithm
- innodb_fast_checksum
- innodb_page_size
- innodb_log_block_size
- redo_log_version
Modify file attributes
Modify file properties, and check the file belongs to mysql user.
chown -R mysql:mysql /data
Start mysqld process and login authentication
- Start mysqld process.
mysqld_safe --defaults-file=/data/backup-my.cnf --user=mysql --datadir=/data &
Here to explain, I commond not found error when using mysqld_safe, so I'll just use mysqld specific differences between Baidu please
2. mysql client login authentication.
mysql -uroot -p
这里我没有拿到 root 账户密码 没办法设置远程登录 于是我直接使用mysqldump 把需要的数据库进行导成sql ，然后在本地导入sql 正常
腾讯说明文档https://cloud.tencent.com/document/product/236/33363