Ettin Pre-training Data

Phase 1 of 3: Diverse pre-training data mixture (1.7T tokens) used to train the Ettin model suite.

This dataset contains the pre-training phase data used to train all Ettin encoder and decoder models. The data is provided in MDS format ready for use with Composer and the ModernBERT training repository.

📊 Data Composition

🚀 Usage

For pre-training, see the ModernBERT repo: https://github.com/AnswerDotAI/ModernBERT

Direct Access

from streaming import StreamingDataset

# Load the streaming dataset
dataset = StreamingDataset(
    remote='https://huggingface.co/datasets/jhu-clsp/ettin-pretraining-data',
    local='/tmp/ettin-pretraining-data',
    shuffle=True
)

# Access samples
for sample in dataset:
    text = sample['text']
    # Process your data...

📁 Structure

Each folder contains one data source in MDS (Mosaic Data Shard) format:

• arxiv/ - Academic papers from ArXiv
• books/ - Literature and reference books
• cc_head/ - High-quality Common Crawl documents
• cc_news/ - News articles from Common Crawl
• dclm/ - DataComp-LM filtered web data
• open_web_math/ - Mathematical web content
• algebraic_stackexchange/ - Math Q&A from StackExchange
• pes2o/ - Scientific papers (PeS2o dataset)
• reddit/ - Reddit discussion threads
• stackexchange/ - General StackExchange Q&A
• starcoder/ - Code from GitHub repositories
• tulu_flan/ - Instruction-following examples
• wikipedia/ - Wikipedia articles

🔗 Related Resources

• Models: Ettin Model Suite (17M-1B parameters)
• Phase 2: Mid-training Data (250B tokens)
• Phase 3: Decay Phase Data (50B tokens)
• Training Order: Batch-level Data Order
• Paper: Arxiv link
• Code: GitHub Repository

Citation

@misc{weller2025seqvsseqopen,
      title={Seq vs Seq: An Open Suite of Paired Encoders and Decoders}, 
      author={Orion Weller and Kathryn Ricci and Marc Marone and Antoine Chaffin and Dawn Lawrie and Benjamin Van Durme},
      year={2025},
      eprint={2507.11412},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2507.11412}, 
}