From: Michael Grimm <trashcan@ellael.org>
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Subject: Cluster of 3 instances in distinct datacenters
Message-Id: <9AB11AAD-B252-4D3F-8A4B-8B8C9522F3D5@ellael.org>
Date: Sun, 14 Jun 2026 13:36:42 +0200
To: pgsql-admin@lists.postgresql.org
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Hi,

I do currently run a postgres cluster spread over two datacenters about =
200km apart. One primary, two secondaries and a master for =
pg_auto_failover (PAF). This cluster has to deal with a data volume of 8 =
GB and read-write operations with numbers of the very low end.

This setup runs perfectly well for the last month.

Now, I intend to move the server -running the PAF master and a secondary =
without quorum- to a datacenter about 1600km distant to the primary and =
other secondary with quorum. Ping between datacenters 200km apart are =
~3ms, ping to the datacenter 1600km apart is ~24ms

Given the low traffic this cluster has to deal with: can a PAF master =
running at such a distant datacenter control the cluster?

Thanks and regards,
Michael