I maintain MariaDB. There is a subpackage containing TokuDB storage engine. (available only for x86_64)
However the TokuDB can't be build against Jemalloc 5, but on F>=28 there is no older jemalloc version. The build without jemalloc is not supported too.
Is it OK to drop the subpackage on F28 and later until the upstream adds the Jemalloc 5 support? I'm ready to drop such update to Bodhi.