The document discusses using logical volume management (LVM) snapshots to backup MySQL databases hosted on InnoDB tables. LVM snapshots provide crash-consistent backups with point-in-time recovery. The process involves flushing tables, locking writes, creating an LVM snapshot, mounting it to back up data, unmounting and discarding the snapshot. Alternatives mentioned are mysqldump, mysqlhotcopy, native InnoDB backups, and using ZFS snapshots. Feedback is welcomed on using LVM snapshots for MySQL backups.