Percona XtraBackup开源的、免费的mysql热备软件，可以执行无阻塞备份InnoDB和XtraDB数据库。
Percona XtraBackup有以下优点：
·备份快速、可靠 ·备份期间，不影响事务连续性
·节省磁盘空间和网络带宽
·自动验证备份
·快速还原，降低系统停机时间
Percona XtraBackup支持Percona Server, MySQL, 和MariaDB所有版本的热备。支持流、压缩和增量mysql备份。
Percona XtraBackup的一些特性：
·创建innodb的hot备份，不需要停数据库
·增量备份mysql
·支持流压缩，将mysql并备份到其他服务器上
·在不同mysql服务器上，在线移动表
·易于创建mysql复制slaves
·备份mysql时，不会增加负载
Percona XtraBackup包含以下工具：
·innobackupex ： 提供了一个脚本集合，可以备份整个mysql数据库实例（包含myisam、innodb和xtradb表的数据库）。
·xtrabackup ： 编译过的c二进制文件，只能copy innodb和xtradb的数据
·xbcrypt ： 加密和解密备份文件
·xbstream ： 支持stream和文件抽取的工具（以xbstream格式抽取）
Percona XtraBackup和MySQL Enterprise Backup特性比较
| Features | Percona XtraBackup | MySQL Enterprise Backup (InnoDB Hot Backup) |
|---|---|---|
| License | GPL | Proprietary |
| Price | Free | $5000 per server |
| Open source | Yes | |
| Streaming and encryption formats | Open source | Proprietary |
| Supported MySQL flavors | Percona Server, MySQL, MariaDB | MySQL |
| Non-blocking InnoDB backups [1] | Yes | Yes |
| Blocking MyISAM backups | Yes | Yes |
| Incremental backups | Yes | Yes |
| Full compressed backups | Yes | Yes |
| Incremental compressed backups | Yes | |
| Fast incremental backups [2] | Yes | |
| Incremental backups with archived logs | Yes | |
| Encrypted backups | Yes | Yes [3] |
| Streaming backups | Yes | Yes |
| Parallel local backups | Yes | Yes |
| Parallel streaming backups | Yes | |
| Parallel compression | Yes | Yes |
| Parallel encryption | Yes | Yes |
| Parallel apply-log | Yes | |
| Parallel copy-back | Yes | |
| Partial backups | Yes | Yes |
| Throttling [4] | Yes | Yes |
| Point-in-time recovery support | Yes | Yes |
| Safe slave backups | Yes | |
| Compact backups [5] | Yes | Yes |
| Buffer pool state backups | Yes | |
| Individual tables export | Yes | Yes [6] |
| Individual partitions export | Yes | |
| Restoring tables to a different server [7] | Yes | Yes |
| Data & index file statistics | Yes | |
| InnoDB secondary indexes defragmentation | Yes | |
| rsync support to minimize lock time | Yes | |
| Improved FTWRL handling | Yes | |
| Backup history table | Yes | |
| Backup progress table | Yes | |
| Offline backups | Yes | |
| Tape backups with Oracle Secure Backup | Yes |