Based on Percona Server 5.6.16-64.2 including all the features and bug fixes in it, and on TokuDB 7.1.5-rc.4, Percona Server 5.6.16-64.2-tokudb is the first BETA release in the Percona Server 5.6 with TokuDB engine series. All of Percona‘s software is open-source and free, all the details of the release can be found in the 5.6.16-64.2 milestone at Launchpad.
Release notes for Percona Server 5.6.16-64.2 with TokuDB storage engine are available in our online documentation. We did our best to eliminate bugs and problems during the testing this release, but this is a software, so bugs are expected. If you encounter them, please report them to our bug tracking system.