Обсуждение: Logical replication versus pglogical on PostgreSQL 14

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Logical replication versus pglogical on PostgreSQL 14

От
Rory Campbell-Lange
Дата:
I'm keen to learn of the differences between logical replication in
PostgreSQL 14 and how this is different from the pglogical extension.

Our intended use case is to have 200-300 publishers off many small
databases aggregating to 20-30 central databases on another PostgreSQL
instance on the same machine.

My questions are:

Is native logical replication and pglogical replication fundamentally
the same?

Is pglogical likely to be continue to be supported?

Is there a roadmap for including more pglogical functionality in native
logical replication?

The following pglogical management functions seem particularly useful to
our use case:

* pglogical.replicate_ddl_command
  sync publisher ddl changes with subscriber

* pglogical.alter_subscription_synchronize
  pglogical.wait_for_subscription_sync_complete/
  pglogical.wait_slot_confirm_lsn
  sync subscription tables

* pglogical.wait_slot_confirm_lsn
  assess if all subscribers are up-to-date
  (monitoring this in native logical replication seems tricky)

Thanks for any comments
Rory






Re: Logical replication versus pglogical on PostgreSQL 14

От
Christian Barthel
Дата:
On Saturday, July 23, 2022, Rory Campbell-Lange wrote:

> Is native logical replication and pglogical replication fundamentally
> the same?

Here is a discussion about the differences between pglogical 2.1 and
logical replication in PostgreSQL 10:
  <https://www.2ndquadrant.com/en/blog/pglogical-logical-replication-postgresql-10/>

As far as I can tell, pglogical provides more features than the builtin
logical replication in PostgreSQL (row/column filtering as an example).

> Is pglogical likely to be continue to be supported?

The link above says so:

| First, let me assure you that the development of pglogical continues.

Furthermore, the last release is from Dec, 2021 and the last commit is
12 days ago, <https://github.com/2ndQuadrant/pglogical>.

-- 
Christian Barthel