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Buffering in memory can be a problem if you are dumping large tables.
If the update statements that the My SQL server receives are short (in terms of execution time), the initial lock period should not be noticeable, even with many updates.
For point-in-time recovery (also known as when you need to restore an old backup and replay the changes that happened since that backup), it is often useful to rotate the binary log (see Section 5.4.4, “The Binary Log”) or at least know the binary log coordinates to which the dump corresponds: storage engine.
For more information on making backups, see Section 7.2, “Database Backup Methods”, and Section 7.3, “Example Backup and Recovery Strategy”.
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It dumps one or more My SQL databases for backup or transfer to another SQL server. Certain options might require other privileges as noted in the option descriptions.
To reload a dump file, you must have the privileges required to execute the statements that it contains, such as the appropriate However, UTF-16 is not permitted as a connection character set (see Section 10.1.5, “Connection Character Sets and Collations”), so the dump file will not load correctly.
To work around this issue, use the advantages include the convenience and flexibility of viewing or even editing the output before restoring.
You can clone databases for development and DBA work, or produce slight variations of an existing database for testing.
It is not intended as a fast or scalable solution for backing up substantial amounts of data.
With large data sizes, even if the backup step takes a reasonable time, restoring the data can be very slow because replaying the SQL statements involves disk I/O for insertion, index creation, and so on.
For large-scale backup and restore, a physical backup is more appropriate, to copy the data files in their original format that can be restored quickly: can retrieve and dump table contents row by row, or it can retrieve the entire content from a table and buffer it in memory before dumping it.