Percona is glad to announce the release candidate of Percona XtraBackup 8.0-3-rc1 on October 31 2018. You can download it from our download site and apt and yum repositories. This is a Release Candidate quality release and it is not intended for production. If you want a high quality, Generally Available release, use the current stable version (the most recent stable version [&]

https://www.percona.com/blog/2018/10/31/percona-xtrabackup-8-0-3-rc1-is-available/