TokuDB is a great storage engine! Online DDL and fast compression are a winning combo. We use it for all our big MySQL tables. It is still available in MySQL 8.0.
I really wish Percona would reconsider their decision to deprecate it.
After Percona took over TokuDB's creator TokuTek, they wasted so much of their development time and money on TokuMX (Percona's fractal tree-enabled MongoDB server) only to abandon it in 2017.
That money would have been better spent on TokuDB development to allow it to match the features present in InnoDB like generated columns, spatial indexing, fulltext Indexes and Galera.
TokuDB still has many users and MyRocks is just no substitute.
I really wish Percona would reconsider their decision to deprecate it.
After Percona took over TokuDB's creator TokuTek, they wasted so much of their development time and money on TokuMX (Percona's fractal tree-enabled MongoDB server) only to abandon it in 2017.
That money would have been better spent on TokuDB development to allow it to match the features present in InnoDB like generated columns, spatial indexing, fulltext Indexes and Galera.
TokuDB still has many users and MyRocks is just no substitute.