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GCP volumes are over network already. You can deploy stateful workloads using StatefulSets. We've run an HBase workloads for development purposes (about 20-30x cheaper than BigTable) and it worked great (no issues for over 12 months). While Postgres is hardly a distributed database, there may be some advantages to ensure availability and perhaps even more in replicated setup.

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Why are you comparing HBase with Postgres? They are very different technologies with completely different architectural constraints?

They both require persistence semantics. I forgot to mention, I was referring to a single node, no-HDFS setup for HBase, solely relying on Kubernetes StatefulSets for data availability, in the simplified persistene sense, not much different than a single Posgres server.

Under those conditions I'd agree theres likely a high overlap of similarity. I have a use case on my home playpen that would likely be served well by that. Thanks for describing your approach.

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