mirror of
https://github.com/azaion/satellite-provider.git
synced 2026-06-21 15:01:14 +00:00
Oleksandr Bezdieniezhnykh
909f69cb3a
Production code:
- POST /api/satellite/tiles/inventory (XOR body, 5000-cap,
most-recent-per-location_hash select, present/absent shaping).
- Kestrel HttpProtocols.Http1AndHttp2 on every listener (AC-5).
- Migration 015 creates tiles_leaflet_path covering index over
(location_hash, captured_at DESC, updated_at DESC, id DESC)
INCLUDE (file_path, source); drops superseded idx_tiles_location_hash.
- TileRepository.GetByTileCoordinatesAsync rewired to filter by
location_hash (Index Only Scan via tiles_leaflet_path).
- TileRepository.GetTilesByLocationHashesAsync added with Npgsql-
direct ANY($1::uuid[]) binding (Dapper IEnumerable expansion is
incompatible with the array form).
- Uuidv5.LocationHashForTile centralises the UUIDv5(TileNamespace,
"{z}/{x}/{y}") formula — single source of truth for the cross-repo
invariant (gps-denied-onboard parity).
Contracts:
- New: contracts/api/tile-inventory.md v1.0.0.
- Bumped: contracts/data-access/tile-storage.md to v2.0.0 (joint
ownership by AZ-503-foundation + AZ-505: schema + covering index +
GetByTileCoordinatesAsync rewrite).
Tests:
- TileInventoryTests covers AC-1, AC-2 (DB-level), AC-4, AC-6.
- Http2MultiplexingTests covers AC-5 (20 concurrent multiplexed GETs
over h2c via SocketsHttpHandler + AppContext Http2Unencrypted switch).
- LeafletPathIndexOnlyTests covers AC-3 (EXPLAIN (ANALYZE, BUFFERS)
asserts Index Only Scan over tiles_leaflet_path with heap_blocks=0).
Docs:
- architecture.md, system-flows.md, data_model.md, module-layout.md,
glossary.md, modules/api_program.md, modules/dataaccess_tile_repository.md,
components/02_data_access/description.md all updated to reference the
v2.0.0 tile-storage contract + new tile-inventory contract + AC-7.
Reports:
- batch_01_cycle6_report.md, batch_01_cycle6_review.md,
implementation_completeness_cycle6_report.md (PASS),
implementation_report_tile_inventory_cycle6.md.
Task spec moved todo/ -> done/.
Co-authored-by: Cursor <cursoragent@cursor.com>
42 lines
2.0 KiB
PL/PgSQL
42 lines
2.0 KiB
PL/PgSQL
-- AZ-505: Leaflet covering index on `tiles` keyed by location_hash.
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--
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-- Forward migration:
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-- 1. Create `tiles_leaflet_path` covering index over (location_hash,
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-- captured_at DESC, updated_at DESC, id DESC) with INCLUDE (file_path, source).
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-- The leading column matches the equality predicate used by the AZ-505
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-- Leaflet hot path (`SELECT file_path FROM tiles WHERE location_hash = $1
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-- ORDER BY captured_at DESC, updated_at DESC, id DESC LIMIT 1`); the INCLUDE
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-- columns make that exact projection an index-only scan once VACUUM ANALYZE
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-- has set the visibility map.
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-- 2. Drop the lightweight `idx_tiles_location_hash` introduced by migration
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-- 014 — it is superseded because equality lookups by `location_hash` use
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-- the leading column of the new covering index.
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--
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-- Back-migration (manual):
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-- DROP INDEX IF EXISTS tiles_leaflet_path;
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-- CREATE INDEX IF NOT EXISTS idx_tiles_location_hash ON tiles (location_hash);
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--
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-- INCLUDE columns are intentionally narrow (`file_path, source`). The richer
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-- inventory endpoint legitimately requires extra columns that are NOT in the
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-- INCLUDE list (`id, captured_at, flight_id, image_type, tile_size_meters,
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-- tile_size_pixels, location_hash`); inventory queries therefore trigger a
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-- bounded heap fetch, which is acceptable per the AZ-505 NFR-Perf-2 budget
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-- (≤ 1000 ms p95 / 2500 tiles). See AZ-505 Risk 1 in the task spec.
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--
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-- Lock window: this migration runs inside DbUp's per-script transaction, which
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-- is incompatible with `CREATE INDEX CONCURRENTLY`. On a populated `tiles`
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-- table the `CREATE INDEX` takes an `ACCESS SHARE` + `SHARE` lock on the table
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-- for the duration of the build, blocking writes. Schedule deploys to a
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-- low-traffic window or pre-build the index out-of-band before running this
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-- migration. See AZ-505 Risk 2.
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BEGIN;
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CREATE INDEX IF NOT EXISTS tiles_leaflet_path
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ON tiles (location_hash, captured_at DESC, updated_at DESC, id DESC)
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INCLUDE (file_path, source);
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DROP INDEX IF EXISTS idx_tiles_location_hash;
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COMMIT;
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