k-shortest-path: add correctness benchmark harness#95
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End-to-end benchmark for Dgraph's k-shortest path algorithm. Compares Dgraph's path-cost vector against a gonum Yen oracle across a maxfrontiersize sweep to detect the eviction-correctness bug reported in dgraph-io/dgraph#9577. One command from zero to results: ./scripts/bench.sh --dataset-url <url> [branch ...] The script downloads the dataset, builds each branch, bulk-loads the graph into Dgraph, sweeps maxfrontiersize, and prints a cross-branch correctness table. Supports detached runs inside a memory-capped systemd transient unit (--detach) for long sweeps on a remote VM. Components: - cmd/prepare: download + convert a DIMACS/CSV road graph to LDBC format - cmd/convert: LDBC -> Dgraph RDF + schema - cmd/bench: sweep maxfrontiersize, compare costs vs gonum Yen oracle - internal/oracle: gonum YenKShortestPaths wrapper - internal/compare: path-cost vector diff (ok/count_mismatch/weight_mismatch) - internal/client: Dgraph DQL shortest-path query + self-consistency check - scripts/bench.sh: end-to-end orchestration (dataset → zero → bulk → sweep) - scripts/lib/alpha.sh: Dgraph alpha lifecycle helpers (start/stop/reset/health) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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End-to-end benchmark for Dgraph's k-shortest path algorithm. Compares Dgraph's path-cost vector against a gonum Yen oracle across a maxfrontiersize sweep to detect the eviction-correctness bug reported in dgraph-io/dgraph#9577.
One command from zero to results:
./scripts/bench.sh --dataset-url [branch ...]
The script downloads the dataset, builds each branch, bulk-loads the graph into Dgraph, sweeps maxfrontiersize, and prints a cross-branch correctness table. Supports detached runs inside a memory-capped systemd transient unit (--detach) for long sweeps on a remote VM.
Components: