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feat: add database maintenance and update home copy

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2026-06-02 11:21:15 +02:00
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ai/tasks/review/TASK-db-retention-audit-report.md Normal file
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---
id: TASK-db-retention-audit-report
source_task: TASK-db-retention-audit
status: review
type: report
---
# Database Retention Audit
## Scope
This report audits the current storage model used by HLL Vietnam for:
- live server snapshots;
- public-scoreboard historical matches and player stats;
- RCON AdminLog events and materialized matches;
- displayed historical snapshots;
- player event raw ledger;
- paused Elo/MMR storage surfaces.
Confirmed facts below are based on the current repository code, not on assumptions.
## Files Inspected
- `AGENTS.md`
- `ai/repo-context.md`
- `ai/architecture-index.md`
- `backend/app/config.py`
- `backend/app/historical_runner.py`
- `backend/app/historical_storage.py`
- `backend/app/historical_snapshot_storage.py`
- `backend/app/player_event_aggregates.py`
- `backend/app/player_event_storage.py`
- `backend/app/postgres_display_storage.py`
- `backend/app/postgres_rcon_storage.py`
- `backend/app/rcon_admin_log_materialization.py`
- `backend/app/rcon_admin_log_storage.py`
- `backend/app/rcon_historical_backfill.py`
- `backend/app/rcon_historical_leaderboards.py`
- `backend/app/rcon_historical_read_model.py`
- `backend/app/rcon_historical_worker.py`
- `backend/app/writer_lock.py`
## Confirmed Storage Areas
### Live and displayed data
- `server_snapshots`
- Present in SQLite live storage and PostgreSQL displayed storage.
- Used for live/current server status history.
- `displayed_historical_snapshots`
- PostgreSQL primary key is `(server_key, snapshot_type, metric, snapshot_window)`.
- Persistence uses upsert semantics, so normal operation is already bounded by logical identity.
### Public-scoreboard historical fallback
- `historical_servers`
- `historical_maps`
- `historical_matches`
- `historical_players`
- `historical_player_match_stats`
- `historical_ingestion_runs`
- `historical_backfill_progress`
These remain part of the displayed historical fallback/read path.
### RCON historical primary path
- `rcon_historical_targets`
- `rcon_historical_capture_runs`
- `rcon_historical_samples`
- `rcon_historical_checkpoints`
- `rcon_historical_competitive_windows`
- `rcon_admin_log_events`
- `rcon_player_profile_snapshots`
- `rcon_materialized_matches`
- `rcon_match_player_stats`
- `rcon_scoreboard_match_candidates`
### Player-event ledger
- `player_event_raw_ledger`
- `player_event_ingestion_runs`
- `player_event_backfill_progress`
### Elo/MMR paused surfaces
Confirmed in backend documentation and runtime payloads as preserved but paused.
This audit did not find cleanup code or explicit retention logic for Elo/MMR tables in the task’s read-first files, so they should stay out of cleanup scope.
## Snapshot Boundedness Findings
### `displayed_historical_snapshots`
Confirmed bounded in PostgreSQL by primary key plus upsert:
- same logical snapshot identity overwrites previous payload;
- normal scheduled refresh does not append unlimited rows;
- routine cleanup is not required for healthy records.
Safe policy:
- do not bulk-delete this table in the first maintenance command;
- only report suspicious legacy/corrupt rows if found later.
### File-based snapshots
Confirmed bounded by deterministic file paths under `backend/data/snapshots/<server>/...`.
Normal writes replace files in place.
Safe policy:
- do not add file cleanup in the first database-maintenance command.
## Retention Windows Confirmed In Runtime Code
Two different historical paths currently exist, and they do not use identical monthly rules.
### Public-scoreboard fallback (`historical_*`)
Confirmed in `backend/app/historical_storage.py`:
- weekly fallback can use previous week when current-week sample is insufficient;
- monthly fallback uses previous month only when current month has zero closed matches;
- `is_early_month` is computed with `current_time.day <= 3`, but selection still depends on zero current-month matches.
### RCON materialized leaderboards (`rcon_materialized_matches`)
Confirmed in `backend/app/rcon_historical_leaderboards.py`:
- monthly leaderboard selection uses previous month through day 7 inclusive;
- weekly selection falls back to previous week when current week lacks the configured minimum closed matches.
## Cleanup Policy Recommendation
Because the new maintenance task explicitly requires:
- latest 100 materialized matches;
- current month;
- previous month during first 7 days of a new month;
- current week;
- previous week when weekly fallback may need it;
the cleanup command should implement the stricter policy directly instead of copying the older `historical_storage.py` month fallback behavior.
## Safe-To-Delete Areas
### 1. `server_snapshots`
Safe to delete old rows by `captured_at` age once outside retention.
Why:
- live UI only needs recent history;
- no dependent child tables were found;
- latest snapshot queries use recent rows only.
Recommended initial retention:
- keep last 14 days by default.
### 2. Non-critical `rcon_admin_log_events`
Safe to delete by event age after retention.
Confirmed critical event types:
- `kill`
- `match_start`
- `match_end`
Everything else should be treated as non-critical for first-pass cleanup:
- `chat`
- `message`
- `connected`
- `disconnected`
- `team_switch`
- `unknown`
- `kick`
- `ban`
- any other non-materialization event type.
Recommended initial retention:
- non-critical: 30 days.
### 3. Critical `rcon_admin_log_events`
Conditionally safe to delete only when both are true:
- older than the critical retention threshold;
- not needed by protected materialized matches/windows.
Recommended initial retention:
- critical: 90 days.
### 4. Old `rcon_materialized_matches`
Conditionally safe to delete when all of the following are true:
- not in latest N closed matches;
- not in current month;
- not in previous month during the first 7 days of a new month;
- not in current week;
- not in previous week when weekly fallback may still be needed.
### 5. Child rows in `rcon_match_player_stats`
Safe to delete only as a dependent delete for non-protected materialized matches.
Delete these before deleting parent matches because no cascade constraint was found.
## Areas That Must Be Protected
### RCON materialized read path
Protect:
- latest 100 closed `rcon_materialized_matches`;
- all `rcon_match_player_stats` for protected matches;
- `kill`, `match_start`, `match_end` events that still support protected matches or currently relevant windows.
### Live/current match surfaces
Protect recent/current RCON data:
- recent `rcon_admin_log_events` still used by current-match kill feed and current-match player stats;
- recent `server_snapshots`.
Reason:
- current-match pages read recent AdminLog windows directly;
- premature deletion would break kill feed or partial player stats.
### Displayed snapshots
Protect:
- `displayed_historical_snapshots` as a bounded read cache;
- file-based snapshots under `backend/data/snapshots/`.
### Public-scoreboard `historical_*`
Do not delete in the first cleanup command.
Reason:
- these tables still back visible historical endpoints and fallback behavior;
- the task’s cleanup requirements are expressed around materialized matches and AdminLog, not around legacy scoreboard imports;
- deleting this domain now would widen scope materially.
### Player-event ledger
Do not delete in the first cleanup command.
Reason:
- it feeds visible player-event snapshots and monthly MVP V2 support;
- no task requirement currently defines safe retention windows for this ledger;
- deleting it without product retention rules is risky.
### Elo/MMR paused data
Do not delete.
Reason:
- task explicitly warns against unrelated Elo/MMR deletions;
- runtime is paused, but persisted surfaces are intentionally preserved.
## Foreign Keys, Cascades, and Orphan Risk
### Confirmed foreign keys
Public-scoreboard historical tables have foreign keys:
- `historical_matches.historical_server_id -> historical_servers.id`
- `historical_matches.historical_map_id -> historical_maps.id`
- `historical_player_match_stats.historical_match_id -> historical_matches.id`
- `historical_player_match_stats.historical_player_id -> historical_players.id`
RCON/postgres tables also define references for some capture-oriented tables.
### Missing cascade behavior relevant to cleanup
No `ON DELETE CASCADE` behavior was found for:
- `rcon_materialized_matches`
- `rcon_match_player_stats`
The materialization code explicitly deletes/rebuilds child player rows itself, which is another signal that cleanup must manage delete order manually.
### Required delete order
For materialized RCON cleanup:
1. identify protected match keys;
2. identify candidate old matches outside protected windows;
3. delete `rcon_match_player_stats` for candidate match keys;
4. delete candidate rows from `rcon_materialized_matches`;
5. delete eligible `rcon_admin_log_events`;
6. delete eligible `server_snapshots`.
This order avoids orphaned player-stat rows.
## Risks and Edge Cases
### Timestamp parsing risk
Some match rows may have:
- missing `started_at`;
- missing `ended_at`;
- only server-time fields;
- malformed or non-ISO timestamps.
Safe rule:
- if a materialized match timestamp cannot be interpreted safely, protect it and skip deletion.
### Cross-path monthly rule mismatch
There is a confirmed mismatch today:
- public-scoreboard fallback code does not strictly use previous month through day 7;
- RCON leaderboard code does.
Cleanup should follow the task requirement, not the older fallback implementation.
### Current-match dependency on recent AdminLog
Current match pages query recent AdminLog rows directly, not only materialized matches.
Deleting recent critical events too aggressively could break live/current-match UI even if historical leaderboards still work.
### Optional table presence
Some environments may not have every migrated or optional table yet.
Maintenance code should treat absent tables as controlled skips, not hard failures.
### SQLite versus PostgreSQL
The repo still supports SQLite fallback when `HLL_BACKEND_DATABASE_URL` is unset.
Maintenance code should either:
- support SQLite safely for the targeted tables; or
- emit a clear unsupported message.
Given the codebase still keeps local SQLite testability, SQLite support is preferable for the cleanup command and its tests.
## Recommended Cleanup Scope For First Implementation
Implement only:
- `server_snapshots`;
- `rcon_admin_log_events`;
- `rcon_materialized_matches`;
- `rcon_match_player_stats`.
Explicitly skip in first implementation:
- `displayed_historical_snapshots`;
- `historical_*`;
- `player_event_raw_ledger` and related worker tables;
- Elo/MMR tables;
- `rcon_historical_samples`, `rcon_historical_competitive_windows`, `rcon_player_profile_snapshots`, `rcon_scoreboard_match_candidates`.
Reason:
- keeps scope aligned to the task;
- avoids deleting sources still needed for visible history fallback or paused domains;
- stays within the repository’s change-budget expectations.
## Implementation Plan For `app.database_maintenance`
1. Add maintenance config accessors for all retention values and batch size.
2. Add a CLI with `cleanup --dry-run` and `cleanup --apply`.
3. Build one plan phase that calculates:
- protected materialized match keys;
- candidate match keys;
- candidate admin-log rows by criticality and age;
- candidate server snapshots by age.
4. Log the plan in structured JSON before any deletes.
5. On apply:
- acquire the shared backend writer lock;
- delete `rcon_match_player_stats` in batches for candidate match keys;
- delete `rcon_materialized_matches` in batches;
- delete `rcon_admin_log_events` in batches;
- delete `server_snapshots` in batches;
- optionally run `VACUUM ANALYZE` only when explicitly requested.
6. Treat missing optional tables as logged skips.
7. Keep dry-run as default behavior.
## Recommended SQL Audit Commands
### Table-size audit
```sql
select
schemaname,
relname as table_name,
pg_size_pretty(pg_total_relation_size(relid)) as total_size,
pg_size_pretty(pg_relation_size(relid)) as table_size,
pg_size_pretty(pg_total_relation_size(relid) - pg_relation_size(relid)) as indexes_size,
n_live_tup as estimated_rows,
n_dead_tup as estimated_dead_rows
from pg_stat_user_tables
order by pg_total_relation_size(relid) desc;
```
### AdminLog by type and age
```sql
select
event_type,
count(*) as row_count,
min(event_timestamp) as first_event_timestamp,
max(event_timestamp) as last_event_timestamp,
min(server_time) as first_server_time,
max(server_time) as last_server_time
from rcon_admin_log_events
group by event_type
order by row_count desc, event_type asc;
```
### Materialized matches by server and closure time
```sql
select
target_key,
source_basis,
count(*) as matches,
min(coalesce(ended_at, started_at)) as first_closed_at,
max(coalesce(ended_at, started_at)) as last_closed_at
from rcon_materialized_matches
group by target_key, source_basis
order by target_key asc, source_basis asc;
```
### Materialized player stats coverage
```sql
select
target_key,
count(*) as player_stat_rows,
count(distinct match_key) as match_count
from rcon_match_player_stats
group by target_key
order by target_key asc;
```
### Live server snapshots by age
```sql
select
server_id,
min(captured_at) as first_captured_at,
max(captured_at) as last_captured_at,
count(*) as snapshot_rows
from server_snapshots
group by server_id
order by last_captured_at desc;
```
### Displayed snapshot coverage
```sql
select
snapshot_type,
metric,
snapshot_window,
count(*) as snapshot_rows,
min(generated_at) as first_generated_at,
max(generated_at) as last_generated_at
from displayed_historical_snapshots
group by snapshot_type, metric, snapshot_window
order by snapshot_type asc, metric asc, snapshot_window asc;
```
### Public-scoreboard fallback historical matches
```sql
select
hs.slug as server_slug,
count(*) as matches,
min(coalesce(hm.ended_at, hm.started_at, hm.created_at_source)) as first_match_at,
max(coalesce(hm.ended_at, hm.started_at, hm.created_at_source)) as last_match_at
from historical_matches hm
join historical_servers hs on hs.id = hm.historical_server_id
group by hs.slug
order by hs.slug asc;
```
### Player-event ledger age
```sql
select
event_type,
count(*) as row_count,
min(occurred_at) as first_occurred_at,
max(occurred_at) as last_occurred_at
from player_event_raw_ledger
group by event_type
order by row_count desc, event_type asc;
```
## Summary
The first cleanup command can be implemented safely if it stays narrow:
- clean `server_snapshots`;
- clean aged `rcon_admin_log_events`;
- clean non-protected `rcon_materialized_matches`;
- delete `rcon_match_player_stats` first for those matches;
- skip bounded snapshot caches and broader fallback domains for now.
The main correctness risk is not delete syntax. It is retention-window selection and preserving current/live dependencies. The cleanup command should therefore be plan-first, dry-run-first, and lock-protected.

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---
id: TASK-final-maintenance-and-copy-validation-report
title: Final maintenance and copy validation report
status: review
type: report
team: PM
supporting_teams: [Backend Senior, Frontend Senior, Arquitecto de Base de Datos]
roadmap_item: validation
priority: high
---
# TASK-final-maintenance-and-copy-validation-report
## Scope
Validation-only report for:
- database maintenance cleanup command
- historical-runner maintenance scheduler
- database maintenance operations documentation
- home copy update removing `Vietnam` outside the trailer block
No runtime code was changed during this validation task.
## Validation Commands Run
```powershell
python -m compileall backend/app
PYTHONPATH=backend python -m unittest backend.tests.test_database_maintenance
PYTHONPATH=backend python -m unittest backend.tests.test_historical_runner_maintenance
PYTHONPATH=backend python -m unittest discover -s backend/tests -p "*historical*"
node --check frontend/assets/js/main.js
node --check frontend/assets/js/historico.js
node --check frontend/assets/js/partida-actual.js
git diff --check
Invoke-RestMethod "http://127.0.0.1:8000/api/historical/snapshots/recent-matches?server=all-servers&limit=10" | ConvertTo-Json -Depth 10
Invoke-RestMethod "http://127.0.0.1:8000/api/historical/snapshots/leaderboard?server=all-servers&timeframe=weekly&metric=kills&limit=10" | ConvertTo-Json -Depth 10
Invoke-RestMethod "http://127.0.0.1:8000/api/historical/snapshots/leaderboard?server=all-servers&timeframe=monthly&metric=kills&limit=10" | ConvertTo-Json -Depth 10
$env:PYTHONPATH='backend'; python -m app.database_maintenance cleanup --dry-run
Invoke-WebRequest "http://127.0.0.1:8080/?v=maintenance-copy-validation"
Invoke-WebRequest "http://127.0.0.1:8080/historico.html?v=maintenance-copy-validation"
Invoke-WebRequest "http://127.0.0.1:8080/partida-actual.html?server=comunidad-hispana-01&v=maintenance-copy-validation"
```
## Result
- `compileall`: passed
- `test_database_maintenance`: passed
- `test_historical_runner_maintenance`: passed
- `*historical*` discovery suite: passed
- frontend JavaScript syntax checks: passed
- `git diff --check`: passed
## Docker Status
Docker smoke validation could not run because the local Docker daemon was unavailable.
Observed error:
`failed to connect to the docker API at npipe:////./pipe/dockerDesktopLinuxEngine`
This prevented:
- `docker compose up -d --build backend frontend postgres`
- `docker compose --profile advanced up -d --build historical-runner rcon-historical-worker`
- `docker compose --profile advanced ps`
- `docker compose logs --tail=200 historical-runner`
- `docker compose exec backend python -m app.database_maintenance cleanup --dry-run`
## Local Smoke Checks
Fallback local processes were started instead:
- backend: `python -m app.main`
- frontend: `python -m http.server 8080`
Endpoint summary:
- recent matches endpoint returned `200` with snapshot data for `all-servers`
- weekly leaderboard endpoint returned `200` with a valid empty weekly result for the current dataset
- monthly leaderboard endpoint returned `200` with valid leaderboard rows
Maintenance dry-run summary:
- backend mode: `sqlite`
- protected materialized matches: `22`
- candidate materialized matches: `0`
- candidate player-stat rows: `0`
- candidate admin-log rows: `0`
- candidate server snapshots: `298`
- skipped tables: none
Frontend HTTP checks:
- `/`: `200`
- `/historico.html`: `200`
- `/partida-actual.html?server=comunidad-hispana-01`: `200`
## Copy Validation
Confirmed in the diff for `frontend/index.html`:
- meta description changed from `HLL Vietnam` to `HLL`
- page title changed from `Comunidad Hispana - HLL Vietnam` to `Comunidad Hispana - HLL`
- logo alt text changed from `HLL Vietnam` to `HLL`
- hero accent changed from `HLL Vietnam` to `HLL`
- trailer text `Primer vistazo a HLL Vietnam` was preserved
- iframe title `Trailer HLL Vietnam` was preserved
No browser-based visual QA was performed in this task.
## Unrelated Notes
Python test runs emitted existing `ResourceWarning` messages about unclosed SQLite connections from current initialization helpers. The test suites still passed, and this task did not change that behavior.
An unintended local runtime artifact at `backend/backend/data/hll_vietnam_dev.sqlite3` was created during smoke setup and removed before final scope review.
## Branch/Push Status
- branch push: not performed
- commit: not performed