Percona XtraBackup is OpenSource online (non-blockable) backup solution for 
InnoDB and XtraDB engines. It works with MySQL 5.0 and 5.1 versions (InnoDB
Plugin and Barracuda format is supported as of release 0.9.5rc) and also can 
handle MyISAM tables.

WWW: http://www.percona.com/docs/wiki/percona-xtrabackup:start

- Alex Samourov
samm@os2.kiev.ua