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Ephemeral databases and Postgres

A database that exists for one test run, one pull request, or one agent task removes a whole class of accidents. These posts cover ephemeral and per-branch Postgres, cloning and point-in-time restore, database isolation for multi-tenant and agent workloads, and the operational side of running Postgres in its own microVM.

Ephemeral Postgres databases on PandaStack

94 posts

·11 min read

Top 6 Burner Postgres Platforms for Pull Requests (2026)

A scratch database for a test run dies with the process that made it. A pull-request database has to survive nine days of review, serve a preview app and a human with psql, be found again by the next CI run, and then be deleted by a job nobody owns. Six platforms, graded on the fourth one.

postgrespull-requestspreview-environments
Ajay Kumar
·11 min read

Top 10 Throwaway psql Platforms for Engineers (2026)

Everyone benchmarks create latency. Nobody benchmarks the part engineers actually wait on, which is the seed. A database you can create in two seconds and must then load 40 GB into is a twenty-minute database -- so grade these ten on the provisioning verb instead.

comparisonpostgresdatabases
Ajay Kumar
·11 min read

Top 9 Temporary PostgreSQL Database Platforms (2026)

A temporary Postgres is produced in one of four ways — a process on the runner, a schema inside somebody else's server, a copy-on-write branch, or a server of its own. The factory decides everything else, including whether your migration rehearsal means anything.

postgresephemeral-databasescomparison
Ajay Kumar
·10 min read

Top 7 Disposable Postgres Platforms for Developers (2026)

Three of the seven ways to get a disposable Postgres are not products you buy. Here are all seven shapes graded on time-to-DSN, isolation boundary, whether they branch real data, and the failure mode each one actually has.

comparisonpostgresdatabases
Ajay Kumar
·10 min read

Top 5 Scratch Postgres Platforms for CI (2026)

Before you shop for a disposable-Postgres product: a tuned postgres:16 container plus CREATE DATABASE ... TEMPLATE beats every platform on the board for unit and most integration tests. Five options for the cases where it genuinely doesn't, including the one where my own platform is the slowest thing here.

postgrescitesting
Ajay Kumar
·11 min read

Top 6 Throwaway Postgres Platforms for Testing in 2026

A database for a human to poke at and a database for forty parallel CI jobs are not the same product. The axes that decide the automated case are parallel isolation, seed-cost amortisation, and what leaks when a run is cancelled at 40%.

postgrestestingci-cd
Ajay Kumar
·11 min read

Top 8 Throwaway Postgres Platforms for 2026

A disposable database is not a feature, it is one of three mechanisms with genuinely different properties — and the one that starts empty can only ever run your unit tests.

postgresephemeral-databasescomparison
Ajay Kumar
·11 min read

Locale, Timezone and Encoding Bugs That Only Appear in Ephemeral Sandboxes

Your code did not change. The environment's opinions changed — and a snapshot makes them permanent in a way a container restart does not.

localeencodingtimezone
Ajay Kumar
·11 min read

Leader Election When Your Compute Can Be Cloned

A restarted process comes up empty and has to ask who the leader is. A restored one never asks — it resumes mid-sentence still believing it holds the lock. Leases, fencing tokens, and why a forked sandbox must revoke leadership before it does anything else.

distributed-systemsleader-electionpostgres
Ajay Kumar

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