In master/slave replication cluster, there are many branch nodes. They are full-blown database servers yet its only purpose is to serve binlogs to its slaves.
Blackhole storage engine does not storage any data in the table, but allows the transactions to be recorded in the binlogs. Therefore it is suitable as binlog servers with reduced capacity requirements.
With the release of Percona server 5.7.20-19 in January 2018, MySQL server becomes a viable solution as it fixes two critical bugs related to blackhole engine.
This talk describes the implementation details.
Michael Wang is a MySQL DBA at Salesforce, he has been attending and giving talks at previous Percona Live conferences for past three years.