Sergey Serebryakov comments

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                                            Sergey Serebryakov

export_kitti.py - Camera and lidar do not have the same ego pose

Can confirm. In each sample, lidar and camera records refer to different `ego_pose` records. Those poses differ in rotation up to 1 degree and translation up to 0.5 m (I...

export_kitti.py - Camera and lidar do not have the same ego pose

@pwais yes, the `ego_pose_token` is different between the cameras and the lidars. The timestamps of the referred poses are the same though.

Fix GCSFS walk() method

@selitvin @aleks-djuric Not sure what does the complaint from `codecov/patch` mean. Would you like to review?

walk method in GCSFSWrapper returns empty string as one of filenames

Yes, I recently realized the version I merged was full of bugs. I've fixed it, let me upstream the patch.

Petastorm sharding + Distributed PyTorch

Thank you! Good to know I'm on the right track. I control the size of the rowgroup, but reducing it also takes away the benefits of Parquet as a format...

Petastorm sharding + Distributed PyTorch

So we went with option 3 for a while. Works fine, but epoch counting is confusing. Then we went with option 1, but we didn't use Petastorm. Given a Parquet...