Per Nick's suggestion on the comments of HBASE-26233. For those who are not familiar with HBASE-26233, it is for re-implementing the region replication framework, to decouple with the general replication framework. You could see the design doc[1] for more details. And the test result shows that it could greatly reduce the replication lag between region replicas.
Here I think we could follow the lazy-consensus way. If there are no objections, we will consider it is OK to backport. Thanks. 1. https://docs.google.com/document/d/1WPSBwRqIPgTrPRM2wtzAe-3XUvA9S7auWy3Fy8xuZLc/edit
