---
license: mit
task_categories:
- image-classification
tags:
- test
- dataset-viewer-test
- row-group-size-issue
size_categories:
- n<1K
---

# 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.