ChainFlow-VLA VLM Feature Cache

This dataset provides cached VLM hidden features and trajectory targets used by ChainFlow-VLA on NAVSIM.

Dataset Structure

navtest/
  navtest.tar.zst
  checksums_navtest.sha256

trainval/
  trainval_0000.tar.zst
  trainval_0001.tar.zst
  ...
  trainval_0023.tar.zst
  checksums_trainval.sha256
  trainval_logs.txt

The trainval split is sharded by NAVSIM log folders. Each shard is an independent .tar.zst archive.

After extraction, each token folder contains:

internvl_feature.gz
trajectory_target.gz

Extract

Extract navtest:

tar --zstd -xf navtest/navtest.tar.zst

Extract all trainval shards:

for f in trainval/trainval_*.tar.zst; do
    tar --zstd -xf "$f"
done

Verify Checksums

Verify navtest:

cd navtest
sha256sum -c checksums_navtest.sha256

Verify trainval:

cd trainval
sha256sum -c checksums_trainval.sha256

Notes

trainval contains 24 independent shards.
navtest is packed into a single archive.
The archives use zstd compression. Please install zstd before extraction if your system does not support tar --zstd.