Dumping Quickly without Buffering in mysqldump

The mysqldump command is used to create backups of MySQL databases by dumping their contents into a file. One of the options available is -q or --quick, which enables the dumping process without buffering, making it suitable for large databases where memory constraints might be an issue.

Here are several examples illustrating the usage of the -q option in mysqldump:

Example 1: Dumping a database named mydatabase without buffering:

            mysqldump -q mydatabase > mydatabase.sql
        

Explanation: This command dumps the contents of mydatabase into a file mydatabase.sql without using buffering, ensuring the dump process is faster and uses less memory.

Example 2: Dumping a specific table users from mydatabase without buffering:

            mysqldump -q mydatabase users > users.sql
        

Explanation: Here, only the users table from mydatabase is dumped into users.sql without buffering, optimizing the dump process.

Example 3: Dumping all databases on the MySQL server without buffering:

            mysqldump -q --all-databases > alldatabases.sql
        

Explanation: This command dumps all databases from the MySQL server into alldatabases.sql file without buffering, which is useful for comprehensive backups.

Example 4: Dumping with compression without buffering:

            mysqldump -q --all-databases | gzip > alldatabases.sql.gz
        

Explanation: This command dumps all databases and compresses the output using gzip without buffering, saving disk space.

Example 5: Dumping a database with specific login credentials without buffering:

            mysqldump -q -u username -p password mydatabase > mydatabase.sql
        

Explanation: This command dumps mydatabase with specified MySQL login credentials without buffering, ensuring secure backup operations.

To verify whether the mysqldump command executed successfully, you can check the existence and size of the output file. For instance, after running any of the above commands, check if the corresponding .sql file has been created and its size corresponds to the expected database dump size.

Also check similar articles.

Setting Connection Protocol in mysqldump
Connecting to MySQL Port in mysqldump
Providing Password for mysqldump Connection
Sorting Rows by Primary Key in mysqldump Output
Enabling Optimization Options in mysqldump