Updated to current AGPL version 18.1.40 and deleted LEGAL. - #9
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JasonCoombs wants to merge 2 commits into
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Updated to current AGPL version 18.1.40 and deleted LEGAL.#9JasonCoombs wants to merge 2 commits into
JasonCoombs wants to merge 2 commits into
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gburd
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Add docs/design/lsm.md comparing three log-structured implementations against the Amethyst adaptive-compaction paper, and refine ROADMAP #9. Findings: - aether (Rust): HanoiDB levels + SuRF/Bloom + STRUCTURE-level adaptation (SingleIndex/Hybrid/MultiLevel via rolling metrics + hysteresis) + work-budget merge strategies. No leveled/tiered choice. - Amethyst (paper): SEGMENT-level adaptive compaction (per-segment leveled/tiered FSM + counters + cooldowns) -- orthogonal to aether, same mechanism. - libxtc (C): Bitcask append-only log + in-memory hash index = the LSM-HASH config. - noxu (Rust): JE-style B+tree-in-WAL + cleaner + VLSN/replication = the index-in-WAL config. Synthesis: a two-axis adaptive LSM (aether structure axis + Amethyst segment policy axis) over one shared rolling-counter+cooldown controller; HanoiDB layout + SuRF/Bloom; and #9 (LSM) / #13 (HASH) / #14 (index-in-WAL) share one log-structured core (Bitcask for HASH, JE cleaner for B-tree).
gburd
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Jul 31, 2026
Add docs/design/lsm.md comparing three log-structured implementations against the Amethyst adaptive-compaction paper, and refine ROADMAP #9. Findings: - aether (Rust): HanoiDB levels + SuRF/Bloom + STRUCTURE-level adaptation (SingleIndex/Hybrid/MultiLevel via rolling metrics + hysteresis) + work-budget merge strategies. No leveled/tiered choice. - Amethyst (paper): SEGMENT-level adaptive compaction (per-segment leveled/tiered FSM + counters + cooldowns) -- orthogonal to aether, same mechanism. - libxtc (C): Bitcask append-only log + in-memory hash index = the LSM-HASH config. - noxu (Rust): JE-style B+tree-in-WAL + cleaner + VLSN/replication = the index-in-WAL config. Synthesis: a two-axis adaptive LSM (aether structure axis + Amethyst segment policy axis) over one shared rolling-counter+cooldown controller; HanoiDB layout + SuRF/Bloom; and #9 (LSM) / #13 (HASH) / #14 (index-in-WAL) share one log-structured core (Bitcask for HASH, JE cleaner for B-tree).
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With all due respect for your original intention to never push Affero GPL updates to this repo, that's nonsense and was always nonsense, so let's push the latest Berkeley DB code here as a mirror. Thanks.