Native streaming replication in PostgreSQL works only between servers running the same major version. We discussed about logical replication in our previous blog post. In that post, we saw how logical replication could help us set up migration between two different PostgreSQL versions. However, logical replication works only for the currently supported versions of PostgreSQL, [&]

https://www.percona.com/blog/2019/04/09/continuous-replication-from-legacy-postgresql-version-using-slony/