Test Dataset: viewer-test-large-images-fail

Purpose: Demonstrate dataset viewer behavior with large images and row group sizing.

Dataset Details

• Number of images: 50
• Total size: ~632MB
• Average per image: ~12.6MB

Expected Behavior

50 large images (~14MB each, ~700MB total). With 100-row row groups, all images land in one ~700MB row group, exceeding the 300MB scan limit.

Prediction: FAIL - Scan size limit exceeded

Technical Context

The dataset viewer converts imagefolder datasets to parquet with:

• Row group size: 100 rows (for image datasets)
• Scan size limit: 300MB

If all images end up in one row group and exceed 300MB, the viewer fails with:

Scan size limit exceeded: attempted to read X bytes, limit is 300000000 bytes

Related Issue

This dataset was created to help debug row group sizing for large images. See: https://github.com/huggingface/dataset-viewer for context.