On Thu, 15 Nov 2018 at 07:06, Ian Lawrence Barwick <barwick@xxxxxxxxx> wrote: > > 2018年11月15日(木) 17:19 Andreas Kretschmer <andreas@xxxxxxxxxxxxxxx>: > > > > Am 15.11.2018 um 08:54 schrieb Sathish Kumar: > > > We would like to migrate our Postgresql VM instance on Google Cloud > > > Platform to Google Cloud SQL with a minimal downtime. As I checked, we > > > have to export and import the SQL file and our database size is large > > > and cannot afford longer downtime. > > > > > > Do any have solution to achieve this?. > > > > setup a replication from one to the other? > > Doesn't seem possible at the moment; here: > https://cloud.google.com/sql/docs/postgres/replication/ > it says: "Cloud SQL for PostgreSQL does not yet support replication > from an external > master or external replicas for Cloud SQL instances." > > Looking at the feature list: > > https://cloud.google.com/sql/docs/postgres/features > > among the "Unsupported features" are: "Any features that require > SUPERUSER privileges" > (apart from a limited number of extensions), which pretty much rules > out pglogical or similar solutions. That usually also rules out Slony-I, although there's a possibility... Slony-I includes a feature called log shipping, which could perhaps be used for this, assuming that the "source" environment does allow superuser privileges. (And I think you're running on a PostgreSQL instance where that's possible...) See: http://slony.info/documentation/logshipping.html -- When confronted by a difficult problem, solve it by reducing it to the question, "How would the Lone Ranger handle this?"
