# kv_bench (Mace vs RocksDB)

Quick start for reproducible comparison. Full guide: [docs/repro.md](./docs/repro.md).

## 5-Minute Quickstart
1. Set your storage root (any mount path, not hardcoded to `/nvme`):

```bash
export KV_BENCH_STORAGE_ROOT=/path/to/your/storage/kvbench
mkdir -p "${KV_BENCH_STORAGE_ROOT}"
```

2. Initialize Python env once:

```bash
cd /home/abby/kv_bench/scripts
./init.sh
source ./bin/activate
cd /home/abby/kv_bench
```

3. Run baseline comparison (both engines write to the same CSV):

```bash
rm -rf "${KV_BENCH_STORAGE_ROOT}/basic_mace" "${KV_BENCH_STORAGE_ROOT}/basic_rocks"
mkdir -p "${KV_BENCH_STORAGE_ROOT}/basic_mace" "${KV_BENCH_STORAGE_ROOT}/basic_rocks"

./scripts/mace.sh "${KV_BENCH_STORAGE_ROOT}/basic_mace" ./scripts/benchmark_results.csv
./scripts/rocksdb.sh "${KV_BENCH_STORAGE_ROOT}/basic_rocks" ./scripts/benchmark_results.csv
```

4. View and plot results:

```bash
./scripts/bin/python ./scripts/plot.py ./scripts/benchmark_results.csv ./scripts
```

## Fast Result Reading
- Raw input CSV: `./scripts/benchmark_results.csv`
- Key columns:
  - `engine` (`mace` / `rocksdb`)
  - `workload_id` (`W1..W6`)
  - `ops_per_sec` (higher is better)
  - `p99_us` (lower is better)
  - `error_ops` (must be 0 before drawing conclusions)

## Phase Reports
- Phase 1 (stability CV):

```bash
./scripts/bin/python ./scripts/phase1_eval.py ./scripts/phase1_results.csv
```

- Phase 2 (core median + slow scenarios):

```bash
./scripts/bin/python ./scripts/phase2_report.py ./scripts/phase2_results.csv
```

- Phase 3 (durability cost):

```bash
./scripts/bin/python ./scripts/phase3_report.py ./scripts/phase3_results.csv
```

- Phase 4 (restart/recovery):

```bash
./scripts/bin/python ./scripts/phase4_report.py ./scripts/phase4_restart_mace.csv
./scripts/bin/python ./scripts/phase4_report.py ./scripts/phase4_restart_rocks.csv
```

## Full Reproduction
For phase-by-phase commands, knobs, and interpretation rules, use [docs/repro.md](./docs/repro.md).