docs: TSDB v2 spec — unified time-series pipeline#567
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Draft for review: one ingestion pipeline (long-format only), stored continuous aggregates (5m/1h), budget-driven retention (state.disk_budget_mb), bounded+observable maintenance rules, and a migration path tested against a copy of a real production DB. Grounded in measured composition of a 2.35 GB production database and the 2026-07-16 upgrade-lock incident. Co-Authored-By: Claude Fable 5 <[email protected]>
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Design spec for review — no implementation. One ingestion pipeline (drop the wide history tiers as tables), stored 5m/1h continuous aggregates, budget-driven retention via
state.disk_budget_mb, bounded/observable maintenance rules, and a migration path tested against a copy of a real production DB.Grounded in measured production numbers (2.35 GB DB: 1.1 GB ts_samples working set, 450 MB unpruned history, 485 MB planner diagnostics) and the 2026-07-16 upgrade-lock incident. Sequenced after the hotfix in #566.
Open questions for review are listed at the end of the spec.
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