W&B stores artifact files in a private Google Cloud Storage bucket located in the United States by default. All files are encrypted at rest and in transit.
For sensitive files, we recommend you set up Private Hosting or use reference artifacts.
During training, W&B locally saves logs, artifacts, and configuration files in the following local directories:
| File | Default location | To change default location set: |
|---|
| logs | ./wandb | dir in wandb.init() or set the WANDB_DIR environment variable |
| artifacts | ~/.cache/wandb | the WANDB_CACHE_DIR environment variable |
| configs | ~/.config/wandb | the WANDB_CONFIG_DIR environment variable |
| staging artifacts for upload | ~/.cache/wandb-data/ | the WANDB_DATA_DIR environment variable |
| downloaded artifacts | ./artifacts | the WANDB_ARTIFACT_DIR environment variable |
Depending on the machine where wandb is initialized, these default folders may not be located in a writable part of the file system. This might trigger an error.
Clean up local artifact cache
W&B caches artifact files to speed up downloads across versions that share files in common. Over time this cache directory can become large. To prune the cache and remove any files you haven’t used recently, run the wandb artifact cache cleanup command.
To limit the cache size to 1 GB, run:
wandb artifact cache cleanup 1GB
