How to perform incremental data backup of MySQL database using Go language

As the amount of data increases, database backup becomes more and more important. For the MySQL database, we can use the Go language to achieve automated incremental backup. This article will briefly introduce how to use Go language to perform incremental backup of MySQL database data.

1. Install the Go language environment

First, we need to install the Go language environment locally. You can go to the official website to download the corresponding installation package and install it.

2. Install the corresponding libraries

The Go language provides many third-party libraries for accessing the MySQL database, among which the more commonly used ones are go-sql-driver/mysql and xorm. This article takes go-sql-driver/mysql as an example to demonstrate how to use this library to back up MySQL database data.

Enter the following command in the terminal to install:

go get github.com/go-sql-driver/mysql

3. MySQL database configuration

In the go-sql-driver/mysql library, we need to use the following code Configure the MySQL database:

dsn := "user:password@tcp(ip:port)/dbname"
db, err := sql.Open("mysql", dsn)
if err != nil {
    panic(err)
}
defer db.Close()

Among them, user and password in dsn are the user name and password required to log in to the MySQL database, ip and port are the address and port of the MySQL database, and dbname is the database name.

4. Data Backup

Go language can create scheduled tasks and perform backup tasks at specified times. The following code can be used to create scheduled tasks:

duration, _ := time.ParseDuration("24h")  // 备份间隔为24小时
timer := time.NewTimer(duration)
for {
    select {
    case <-timer.C:
        // 执行备份任务
        backup(db)
        // 重置计时器
        timer.Reset(duration)
    }
}

Among them, the Backup function is the backup function of the MySQL database. The specific implementation is as follows:

func backup(db *sql.DB) {
    filepath := "backup.sql"
    // 获取备份时间戳
    now := time.Now().Format("20060102150405")
    // 构造备份文件名
    filename := fmt.Sprintf("%s_%s", filepath, now)
    // 执行备份命令
    cmd := exec.Command("mysqldump", "-u", "user", "-p", "password", "dbname", "--result-file="+filename)
    if err := cmd.Run(); err != nil {
        panic(err)
    }
}

After the backup task is executed, a backup will be generated in the current directory. The .sql file whose file name is prefixed and suffixed by timestamp is the backup file of the MySQL database.

5. Data recovery

It is very simple to use the backup file of the MySQL database to restore data. You only need to execute the following command:

mysql -u user -p password dbname < backup.sql

Among them, user and password are respectively The user name and password required to log in to the MySQL database, dbname is the database name, and backup.sql is the backup file name.

6. Summary

This article introduces how to use Go language to perform incremental data backup of MySQL database. Through scheduled tasks, we can achieve automated backup. At the same time, backup file generation and data recovery are also quite easy.

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