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pretty_name: TRQA Experiments
tags:
- retrieval
- information-retrieval
- faiss
- lucene
---
# TRQA Experiments
Prebuilt retrieval indices and experiment results accompanying the
[**TRQA dataset**](https://dl.acm.org/doi/pdf/10.1145/3805712.3808629).
This repo holds only artifacts. The queries, qrels, and corpora live in
[`mahtaa/trqa`](https://huggingface.co/datasets/mahtaa/trqa).
## Repo structure
| Path | Contents | Retriever type |
|---|---|---|
| `experiment_results/` | `experiment_results.zip` — retrieval + evaluation outputs | — |
| `indices/ecommerce/` | Indices over the **synthetic e-commerce corpus** | |
| `bm25/` | Lucene index | sparse |
| `spladepp/` | Lucene index (SPLADE++) | learned sparse |
| `bge/` | `bge_Flat.index` | dense (FAISS) |
| `e5/` | `e5_Flat.index` | dense (FAISS) |
| `contriever/` | `contriever_Flat.index` | dense (FAISS) |
| `indices/wiki/` | Indices over the **full English Wikipedia corpus** | |
| `bm25/` | Lucene index | sparse |
| `spladepp/` | Lucene index (SPLADE++) | learned sparse |
| `bge/` | `bge_Flat.index` — **5 parts** | dense (FAISS) |
| `e5/` | `e5_Flat.index` — **4 parts** | dense (FAISS) |
| `contriever/` | `contriever_Flat.index` — **4 parts** | dense (FAISS) |
| `indices/wiki_partial/` | Indices over the **partial Wikipedia corpus** | |
| `e5_partial/` | `e5_Flat.index` (exact / flat) | dense (FAISS) |
| `bm25_partial/` | Lucene index | sparse |
| `spladepp_partial/` | Lucene index (SPLADE++) | learned sparse |
| `bge_partial/` | `bge_Flat.index` (exact / flat) | dense (FAISS) |
| `contriever_partial/` | `contriever_Flat.index` (exact / flat) | dense (FAISS) |
| `qwen3_emb_4b_partial/` | `qwen3_emb_4b_Flat.index` (exact / flat) — **2 parts** | dense (FAISS) |
## Reassembling split indices
The large dense indices (the three full Wikipedia ones and the partial
Wikipedia Qwen3-Embedding-4B one) are stored as 45 GB chunks. Concatenate
the parts in order before use:
```bash
cat bge_Flat.index.part_* > bge_Flat.index
cat e5_Flat.index.part_* > e5_Flat.index
cat contriever_Flat.index.part_* > contriever_Flat.index
cat qwen3_emb_4b_Flat.index.part_* > qwen3_emb_4b_Flat.index
```
`cat` with a shell glob sorts the suffixes (`part_aa`, `part_ab`, …) correctly.
All other indices are ready to use as-is.
|