早上看到一条消息，说TokuDB要被放弃了，去官方看了下，确有此事，如下是官方的说法：
TokuDB is deprecated in the 8.0 series and will be supported through the 8.0 series until further notice. This storage engine will not be included in the next major release of Percona Server for MySQL. We recommend MyRocks as a long-term migration path.
大体意思就是说，TokuDB在 8.0 版本已标记为废除状态，下一个大版本更新将会移除此引擎，官方推荐了性能更优的 MyROcks 引擎。
不过TokuDB 很多特性还是不错的，让我再回顾下吧：
- Up to 25x Data Compression
- Fast Inserts
- Eliminates Slave Lag with Read Free Replication
- Hot Schema Changes
- Hot Index Creation - TokuDB tables support insertions, deletions and queries with no down time while indexes are being added to that table
- Hot column addition, deletion, expansion, and rename - TokuDB tables support insertions, deletions and queries without down-time when an alter table adds, deletes, expands, or renames columns
- On-line Backup
技术是向前不断进步的，新老技术更替也是很正常了，继续学习吧，这下是关于 myrocks 的介绍。
https://www.percona.com/doc/percona-server/8.0/myrocks/index.html
