Archive FTWDB as an energy-storage test lab

README.md

@@ -1,4 +1,24 @@
-# FTWDB
+# FTWDB — archived energy-storage test lab
+
+**Archived on 8 September 2026.** This repository preserves the experimental
+engine, fault tests, sanitized workloads and database comparison results. It
+has no active release or support programme.
+
+FTW now embeds DuckDB in Core for history and keeps SQLite for configuration.
+FTWDB is no longer part of the FTW runtime. New storage work belongs in
+[FTW Core](https://github.com/srcfl/ftw/tree/master/go/internal/state).
+
+Start with the [archive record and lessons](docs/test-lab.md), the
+[engine comparison](docs/results/2026-09-07-engine-evaluation.md), and the
+[archived benchmark runners and raw measurements](bench/engine-evaluation-2026-09-07/README.md).
+The final local work is preserved on
+[`archive/final-lab-snapshot-2026-09-08`](https://github.com/srcfl/ftwdb/tree/archive/final-lab-snapshot-2026-09-08).
+That snapshot is separate from the newer fixes already on `main`.
+
+## Historical engine and lab commands
+
+The material below describes the experiment at archive time. Commands are for
+isolated research on copies of data, not a supported installation path.
 
 **Forecasts, Telemetry & Watts.**
 
@@ -7,7 +27,7 @@ small Rust engine that is fast on time-window aggregates, survives abrupt power
 loss, and minimizes write amplification on SD cards and other constrained edge
 storage.
 
-The current release is **v0.1.0-alpha.1**. It is an evaluation build for Unix
+The last published release is **v0.1.0-alpha.1**. It is an evaluation build for Unix
 systems, not a production release. Download release archives from
 [GitHub Releases](https://github.com/srcfl/ftwdb/releases), or install the CLI
 from its immutable tag:

bench/README.md

@@ -1,5 +1,9 @@
 # Competitor harness
 
+This is a frozen test lab. See the [archive record](../docs/test-lab.md) and
+the later [September engine evaluation](engine-evaluation-2026-09-07/README.md).
+The registry below describes the earlier harness and its subset coverage.
+
 `compose.yml` pins each server image by digest. Profiles keep heavyweight
 engines from accidentally running together on a developer laptop.
 

bench/engine-evaluation-2026-09-07/README.md

@@ -0,0 +1,27 @@
+# Archived engine evaluation
+
+Historical runs from 7 September 2026. Read the [report](../../docs/results/2026-09-07-engine-evaluation.md) for methods, results and limits, and the [archive record](../../docs/test-lab.md) for the later DuckDB/Core decision.
+
+`results/` retains the raw submission and query timing samples, validation, settings and failures. Main SQL results use three fresh runs per engine, with `binary-clickhouse-*` for ClickHouse. `parquet-*` compares the same Parquet file. `bounded-*`, `semantics-*` and `restore.json` cover separate scopes. `smoke*` and `precise-*` include setup or rejected transfer paths and must not enter the main ranking.
+
+The archive removes workstation paths, detailed process/cgroup dumps and volume file listings. It retains recorded memory peaks and footprint totals. Timing and validation values are unchanged. `provenance.json` records original and archived SHA-256 values and each transformation. No private site export, running database, credential or backup is included. The sanitized input fixture was already public in this repository.
+
+`harness/` preserves the original Go/Python adapters and runner, with one path change: `FTWDB_EVAL_FIXTURE` or the checked-in fixture replaces a workstation path. The old report generator is omitted because it would recreate a superseded product recommendation. The archived runners were syntax-checked during preservation; the database workloads were not rerun.
+
+## Reading the evidence
+
+- `results/fixture.json`: input identity and counts.
+- `results/environment.json`: original platform, versions and artifact hashes. Hashes for binaries and the generated Parquet file refer to original run artifacts, which are not shipped here.
+- `results/summary.json`: medians from the successful comparison paths.
+- `results/main-*`, `results/binary-*`: repeated full-day imports and queries.
+- `results/parquet-*`: first and warm query times over one identical file.
+- `results/semantics-*`: one process kill and duplicate-identity probes per configuration.
+- `results/restore.json`: offline restore to fresh volumes.
+
+## Reusing the runners
+
+Work in a scratch copy so the historical results stay unchanged. The runners create Docker containers, an internal network and named volumes with the `ftwdb-eval-` prefix. They expect Linux ARM64 tools, a Go-built `bin/sqlite-http`, DuckDB 1.5.5 in `bin/python-site`, the image digests in `harness/run.py`, and `results/`, `logs/`, `snapshots/` directories under the evaluation root. Set `FTWDB_EVAL_FIXTURE` to the absolute path of `bench/fixtures/ftw-real-v1/points.csv.gz` when moving the runner.
+
+The Go adapter uses the pinned dependencies in `harness/go.mod` and `go.sum`. `run.py` accepts engine, repeat, memory, row-limit and prefix arguments; inspect `--help` before running. RowBinary uses `FTWDB_EVAL_CH_BINARY=1`. `parquet_probe.py` expects the Go-generated `snapshots/day.parquet` from a preceding SQLite run. Archive/restore probes expect the earlier stopped test volumes. They are not self-contained benchmarks without this setup.
+
+Keep first-run and warm timings separate, verify every result, record new hardware and versions, and use fresh prefixes and volumes. Stopping a run retains its volumes; deletion is a separate operator action. A fork that revives this lab needs to validate its own dependencies and execution environment.

bench/engine-evaluation-2026-09-07/harness/archive_stores.py

@@ -0,0 +1,28 @@
+"""Archive only the evaluation's own stopped stores and record their size."""
+import json, pathlib,subprocess
+from run import ROOT,IMAGES,docker
+
+SELECTION={'sqlite-full':'main-sqlite-full-r3','sqlite-normal':'main-sqlite-normal-r3','duckdb':'main-duckdb-r3','vm':'main-vm-r3','influx':'main-influx-r3','clickhouse':'binary-clickhouse-r3'}
+
+def main():
+ args=['run','--rm','--network','none','--cpus','1','--memory','128m','--mount',f'type=bind,source={ROOT},target=/eval']
+ for kind,tag in SELECTION.items():
+  r=json.loads((ROOT/'results'/(tag+'.json')).read_text());assert r['ok']
+  state=json.loads(docker('inspect','ftwdb-eval-'+tag))[0]['State'];assert not state['Running']
+  args+=['--mount',f"type=volume,source={r['volume']},target=/vols/{kind},readonly"]
+ code='''
+import pathlib,json,tarfile,hashlib
+out={}
+for root in pathlib.Path('/vols').iterdir():
+ files=[p for p in root.rglob('*') if p.is_file()]
+ entries=[{'path':str(p.relative_to(root)),'bytes':p.stat().st_size,'allocated_bytes':p.stat().st_blocks*512} for p in files]
+ target=pathlib.Path('/eval/snapshots')/('store-'+root.name+'.tar')
+ with tarfile.open(target,'w') as tar:tar.add(root,arcname='data')
+ with tarfile.open(target,'r') as tar:assert sum(m.isfile() for m in tar.getmembers())==len(files)
+ out[root.name]={'logical_bytes':sum(p['bytes'] for p in entries),'allocated_bytes':sum(p['allocated_bytes'] for p in entries),'files':entries,'archive_sha256':hashlib.sha256(target.read_bytes()).hexdigest()}
+pathlib.Path('/eval/results/store-footprints.json').write_text(json.dumps(out,indent=2))
+print(json.dumps({k:{'bytes':v['logical_bytes'],'files':len(v['files'])} for k,v in out.items()}))
+'''
+ args+=[IMAGES['duckdb'],'python','-c',code];print(docker(*args))
+
+if __name__=='__main__':main()

bench/engine-evaluation-2026-09-07/harness/clickhouse.xml

@@ -0,0 +1,34 @@
+<clickhouse>
+ <logger><level>warning</level><console>true</console></logger>
+ <listen_host>0.0.0.0</listen_host>
+ <http_port>8080</http_port>
+ <tcp_port>9000</tcp_port>
+ <path>/data/</path><tmp_path>/data/tmp/</tmp_path>
+ <user_files_path>/data/user_files/</user_files_path>
+ <max_connections>32</max_connections><max_concurrent_queries>4</max_concurrent_queries>
+ <max_server_memory_usage>402653184</max_server_memory_usage>
+ <mark_cache_size>16777216</mark_cache_size><uncompressed_cache_size>0</uncompressed_cache_size>
+ <max_thread_pool_size>128</max_thread_pool_size>
+ <background_pool_size>2</background_pool_size>
+ <background_move_pool_size>1</background_move_pool_size>
+ <background_fetches_pool_size>1</background_fetches_pool_size>
+ <background_schedule_pool_size>4</background_schedule_pool_size>
+ <background_buffer_flush_schedule_pool_size>1</background_buffer_flush_schedule_pool_size>
+ <background_distributed_schedule_pool_size>1</background_distributed_schedule_pool_size>
+ <background_message_broker_schedule_pool_size>1</background_message_broker_schedule_pool_size>
+ <profiles><default>
+  <max_threads>1</max_threads><max_memory_usage>134217728</max_memory_usage>
+  <max_block_size>8192</max_block_size>
+  <input_format_parallel_parsing>0</input_format_parallel_parsing>
+  <precise_float_parsing>1</precise_float_parsing>
+  <output_format_parallel_formatting>0</output_format_parallel_formatting>
+  <log_queries>0</log_queries><async_insert>0</async_insert>
+ </default></profiles>
+ <users><default><password></password><networks><ip>::/0</ip></networks><profile>default</profile><quota>default</quota></default></users>
+ <quotas><default><interval><duration>3600</duration><queries>0</queries><errors>0</errors><result_rows>0</result_rows><read_rows>0</read_rows><execution_time>0</execution_time></interval></default></quotas>
+ <merge_tree>
+  <number_of_free_entries_in_pool_to_lower_max_size_of_merge>1</number_of_free_entries_in_pool_to_lower_max_size_of_merge>
+  <number_of_free_entries_in_pool_to_execute_mutation>1</number_of_free_entries_in_pool_to_execute_mutation>
+  <number_of_free_entries_in_pool_to_execute_optimize_entire_partition>1</number_of_free_entries_in_pool_to_execute_optimize_entire_partition>
+ </merge_tree>
+</clickhouse>

bench/engine-evaluation-2026-09-07/harness/duck_server.py

@@ -0,0 +1,42 @@
+"""Isolated HTTP adapter for the pinned embedded DuckDB library."""
+import http.server, json, os, pathlib, signal, sys
+import duckdb
+
+db=duckdb.connect('/data/eval.duckdb',config={
+ 'threads':'1','memory_limit':'128MiB','temp_directory':'/data/tmp',
+ 'enable_external_access':'true','autoinstall_known_extensions':'false',
+ 'autoload_known_extensions':'false'})
+db.execute('CREATE TABLE IF NOT EXISTS samples(driver VARCHAR,metric VARCHAR,ts_ms BIGINT,value DOUBLE,PRIMARY KEY(driver,metric,ts_ms))')
+def shutdown(*args):
+ db.close();sys.exit(0)
+signal.signal(signal.SIGTERM,shutdown)
+
+class Handler(http.server.BaseHTTPRequestHandler):
+ def log_message(self,*args): pass
+ def do_GET(self): self.handle_request()
+ def do_POST(self): self.handle_request()
+ def handle_request(self):
+  try:
+   path=self.path.split('?')[0]
+   if path=='/health': result={'duckdb':duckdb.__version__}
+   elif path=='/write':
+    body=self.rfile.read(int(self.headers.get('Content-Length','0')))
+    pathlib.Path('/data/batch.csv').write_bytes(body)
+    db.execute('BEGIN')
+    try:
+     db.execute("COPY samples FROM '/data/batch.csv' (FORMAT CSV,HEADER false)")
+     db.execute('COMMIT')
+    except Exception:
+     db.execute('ROLLBACK');raise
+    os.unlink('/data/batch.csv');result={'rows':body.count(b'\n')}
+   elif path=='/query':
+    sql=self.rfile.read(int(self.headers.get('Content-Length','0'))).decode()
+    c=db.execute(sql);cols=[c[0] for c in c.description]
+    result=[dict(zip(cols,row)) for row in c.fetchall()]
+   else: raise ValueError('unknown path')
+   body=json.dumps(result,allow_nan=False).encode();self.send_response(200)
+  except Exception as e:
+   body=json.dumps({'error':str(e)}).encode();self.send_response(500)
+  self.send_header('Content-Length',str(len(body)));self.end_headers();self.wfile.write(body)
+
+http.server.HTTPServer(('0.0.0.0',8080),Handler).serve_forever()

bench/engine-evaluation-2026-09-07/harness/go.mod

@@ -0,0 +1,27 @@
+module ftwdb-eval
+
+go 1.26.0
+
+require (
+	github.com/parquet-go/parquet-go v0.32.0
+	modernc.org/sqlite v1.56.0
+)
+
+require (
+	github.com/andybalholm/brotli v1.1.1 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/mattn/go-isatty v0.0.24 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/parquet-go/bitpack v1.0.0 // indirect
+	github.com/parquet-go/jsonlite v1.0.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.21 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/twpayne/go-geom v1.6.1 // indirect
+	golang.org/x/sys v0.47.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
+	modernc.org/libc v1.74.4 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+)

bench/engine-evaluation-2026-09-07/harness/go.sum

@@ -0,0 +1,80 @@
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