---
license: mit
---

We release the raw passages, embeddings, and index of MassiveDS.

Website: https://retrievalscaling.github.io

We release two versions of MassiveDS:
1. [MassiveDS-1.4T](https://huggingface.co/datasets/rulins/MassiveDS-1.4T), which contains 1.4T tokens in the datastore.
2. [MassiveDS-140B](https://huggingface.co/datasets/rulins/MassiveDS-140B), which is a subsampled version containing 140B tokens in the datastore.

File structure:
* `raw_data`: plain data in JSONL files.
* `passages`: chunked raw passages with passage IDs. Each passage is chunked to have no more than 256 words.
* `embeddings`: embeddings of the passages encoded with Contriever-MSMACRO.
* `index`: flat index built with embeddings.

Note: due to large data volume, we are still uploading the data for MassiveDS-1.4T. MassiveDS-140B is ready to go. Code support to run with MassiveDS is in https://github.com/RulinShao/retrieval-scaling.