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Subject: Load balancing of write queries among health-checked nodes
Date: Tue, 08 Oct 2024 07:03:57 +0400
Message-ID: <[email protected]> (raw)
Hello. I have a PostgreSQL high availability cluster with Pgpool-II, but I don't use the virtual IP feature so my clients don't know which node to send queries to. DNS round-robin is not a solution because it can't distinguish between healthy and dead nodes.
I thought about having a Pgpool-II instance on each client (client Pgpool-II -> cluster Pgpool-II -> PostgreSQL), but AFAIK it can't distribute write queries. I also know that libpq may have multiple nodes to connect, but I need an advanced health check because a node may have connectivity but be separated from the whole cluster so it must be considered dead.
Is there any solution?
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