Replication of large objects isn’t currently supported by the community version of PostgreSQL logical replication. If you try to replicate a large object with logical replication, PostgreSQL will return: Large objects aren’t supported by logical replication. It’s a meaningful error (always nice), but not helpful if you have large objects that you need to replicate.

pgEdge has developed an extension named LargeObjectLOgicalReplication (LOLOR) that provides support for replicating large objects. The primary goal of LOLOR is to provide seamless replication of large objects with pgEdge Spock multi-master distributed replication.