Module timeseries Roadmap

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Timeseries Module Roadmap

Current Status

Production-capable timeseries runtime exists for ingest, Gorilla compression, adaptive flush, query/downsampling, retention, remote-write, and encrypted chunk handling.

In Progress

• [~] hardening adaptive flush and high-ingest behavior under sustained concurrency pressure (Target: Q3 2026)
• [~] improving diagnostics consistency across ingest, query, and retention stages (Target: Q3 2026)
• [~] stabilizing benchmark-backed release guardrails for timeseries hot paths (Target: Q3 2026)

Planned Features

Short-term (3-6 months)

• tighten deterministic behavior for remote-write and encrypted chunk edge scenarios (Completed 2026-09-16 — test_timeseries_highcardinality_stress.cpp, RemoteWriteEdgeCases)
• expand stress coverage for mixed ingest/query/downsampling workloads (Completed 2026-09-16 — test_timeseries_highcardinality_stress.cpp, HighCardinalitySeriesIngest/ConcurrentDownsamplingStress)
• improve operator-facing diagnostics for retention and flush incidents (Completed 2026-09-16 — RUNBOOK_TIMESERIES_STORE.md)

Mid-term (6-12 months)

• [~] re-baseline p95/p99 envelopes for ingest, range-query, and flush-sensitive paths (Target: Q1 2027 — bench_timeseries_dedicated_gates.cpp TS-BM-01..TS-BM-04 in place; hardware run required)
• [~] broaden benchmark depth for remote-write and lifecycle workload diversity (Target: Q1 2027 — bench_timeseries_dedicated_gates.cpp TS-BM-01..TS-BM-04 in place)
• harden long-run reliability under sustained timeseries load (Completed 2026-09-16 — tests/integration/test_timeseries_store_soak.cpp)

Implementation Phases

Phase 1: Design / API Contract

• freeze timeseries ingest/query/lifecycle contracts for current major line (Completed 2026-07-29)
• define explicit error taxonomy for flush, query, and retention incidents (Completed 2026-07-29)

Phase 2: Core Implementation

• complete hardening for TSStore, flush controller, and query internals (Completed 2026-09-16 — stress/soak coverage validates runtime contracts)
• align encrypted chunk and remote-write behavior to bounded runtime contracts (Completed 2026-09-16 — RemoteWriteEdgeCases stress test)

Phase 3: Error Handling and Edge Cases

• standardize fail-safe behavior for buffer pressure, retention faults, and remote-write validation errors (Completed 2026-09-16 — RemoteWriteEdgeCases / FlushReliability soak)
• unify diagnostics across ingest, lifecycle, and integration incident classes (Completed 2026-09-16 — RUNBOOK_TIMESERIES_STORE.md)

Phase 4: Tests

• expand focused regressions for adaptive flush, range-query, and encryption edge scenarios (Completed 2026-07-29 — test_timeseries_contract_hardening_focused.cpp, TSCH-01..TSCH-16)
• extend deterministic stress fixtures for concurrent ingest/query workloads (Completed 2026-07-29)

Phase 5: Performance and Hardening

• lock benchmark-backed release gates for timeseries hot paths (Completed 2026-07-29 — bench_timeseries_release_gates.cpp, TSRG-01..TSRG-06)
• validate p95/p99 and throughput behavior against release baselines (Completed 2026-08-07)

Phase 6: Documentation and Acceptance

• core timeseries module docs aligned to source-verifiable behavior (Completed 2026-08-07)
• roadmap/future planning separated from historical changelog entries (Completed 2026-08-07)
• timeseries_api_contract.h frozen contract header published (Completed 2026-07-29)
• PHASE_6_ACCEPTANCE_CHECKLIST.md created with all acceptance criteria (Completed 2026-08-07)
• operator documentation complete including tuning guide and troubleshooting (Completed 2026-08-07)
• performance characteristics documented in PERFORMANCE_EXPECTATIONS.md (Completed 2026-08-07)

Production Readiness Checklist

• core timeseries surfaces documented and source-verified
• module-level security and failure behavior documented
• benchmark mapping documented in performance expectations
• timeseries_api_contract.h frozen contract header (Phase 1 closure, 2026-07-29)
• test_timeseries_contract_hardening_focused.cpp — TSCH-01..TSCH-16 (Phase 4 closure, 2026-07-29)
• bench_timeseries_release_gates.cpp — TSRG-01..TSRG-06 gate benchmarks (Phase 5 closure, 2026-07-29)
• remaining hardening tasks closed for ingest/flush/lifecycle edge paths (Completed 2026-09-16 — Wave D soak/stress/runbook pass)
• release benchmark stabilization complete (Completed 2026-09-16 — bench_timeseries_dedicated_gates.cpp TS-BM-01..TS-BM-04)

Known Issues and Limitations

• runtime behavior depends on workload shape, flush configuration, and storage profile.
• selected flush, retention, and encrypted chunk edge scenarios need continued hardening.
• benchmark depth should continue expanding for broader timeseries workloads.

Breaking Changes

No breaking timeseries contract planned. Any contract-breaking change requires migration notes and changelog entry before merge.

Program Execution Model — Wave Context

This module is a contributing module in the program-level Wave A → B → C → D execution model. It does not own a primary wave deliverable but must remain release_critical-green throughout all waves and must deliver Wave D operability improvements in Q1 2027. See ../../ROADMAP.md for the full wave model and exit criteria.

Wave D Contribution for timeseries

• Deliver or validate distributed tracing, high-cardinality stress coverage, exporter reliability, and operator remediation hints as applicable to this module (Completed 2026-09-16 — test_timeseries_highcardinality_stress.cpp, bench_timeseries_dedicated_gates.cpp, RUNBOOK_TIMESERIES_STORE.md)
• Contribute to or validate long-duration soak test coverage for this module's primary paths (Completed 2026-09-16 — tests/integration/test_timeseries_store_soak.cpp)
• Ensure runbook coverage for operator-critical scenarios in this module (Completed 2026-09-16 — docs/operability/RUNBOOK_TIMESERIES_STORE.md)

Cross-Wave Requirements

• release_critical CI must remain green on develop throughout all waves (Target: ongoing)
• p95/p99 benchmarks must be refreshed on representative hardware before Wave D sign-off (Target: Q1 2027)
• No behavioral regression may be introduced into modules in Wave A/B/C scope from changes in this module.

Program-Level Success Criteria (contribution)

• This module's distributed/acceleration paths fail closed (Completed 2026-09-16 — flush/remote-write fail-safe validated in soak/stress)
• [~] Benchmark-backed p95/p99 baselines exist on representative hardware (Target: Q1 2027 — bench_timeseries_dedicated_gates.cpp TS-BM-01..TS-BM-04; hardware run required)
• Operator-critical paths have diagnostics, alerts, and runbooks (Completed 2026-09-16 — RUNBOOK_TIMESERIES_STORE.md)

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