mylvmbackup is a tool for quickly creating full physical backups of a MySQL
server's data files. To perform a backup, mylvmbackup obtains a read lock on
all tables and flushes all server caches to disk, makes an LVM snapshot of
the volume containing the MySQL data directory, and unlocks the tables again.
The snapshot process takes only a small amount of time. When it is done, the
server can continue normal operations, while the actual file backup proceeds.