Git for data scientists - manage your code and data together
Data Version Control or DVC is an open-source tool for data science and machine learning projects. Key features:
- Simple command line Git-like experience. Does not require installing and maintaining any databases. Does not depend on any proprietary online services.
- Management and versioning of datasets and machine learning models. Data is saved in S3, Google cloud, Azure, Alibaba cloud, SSH server, HDFS, or even local HDD RAID.
- Makes projects reproducible and shareable; helping to answer questions about how a model was built.
- Helps manage experiments with Git tags/branches and metrics tracking.
DVC aims to replace spreadsheet and document sharing tools (such as Excel or Google Docs) which are being used frequently as both knowledge repositories and team ledgers. DVC also replaces both ad-hoc scripts to track, move, and deploy different model versions; as well as ad-hoc data file suffixes and prefixes.
How DVC works
We encourage you to read our Get Started guide to better understand what DVC is and how it can fit your scenarios.
The easiest (but not perfect!) analogy to describe it: DVC is Git (or Git-LFS to be precise) & Makefiles made right and tailored specifically for ML and Data Science scenarios.
- Git/Git-LFS part - DVC helps store and share data artifacts and models, connecting them with a Git repository.
- Makefiles part - DVC describes how one data or model artifact was built from other data and code.
DVC usually runs along with Git. Git is used as usual to store and version code (including DVC meta-files). DVC helps to store data and model files seamlessly out of Git, while preserving almost the same user experience as if they were stored in Git itself. To store and share the data cache, DVC supports multiple remotes - any cloud (S3, Azure, Google Cloud, etc) or any on-premise network storage (via SSH, for example).
The DVC pipelines (computational graph) feature connects code and data together. It is possible to explicitly specify all steps required to produce a model: input dependencies including data, commands to run, and output information to be saved. See the quick start section below or the Get Started tutorial to learn more.
Please read Get Started guide for a full version. Common workflow commands include:
$ git add train.py
$ dvc add images.zip
|Connect code and data by commands||
$ dvc run -d images.zip -o images/ unzip -q images.zip
$ dvc run -d images/ -d train.py -o model.p python train.py
|Make changes and reproduce||
$ vi train.py
$ dvc repro model.p.dvc
$ git add .
$ git commit -m 'The baseline model'
$ git push
|Share data and ML models||
$ dvc remote add myremote -d s3://mybucket/image_cnn
$ dvc push
There are four options to install DVC: pip, Homebrew, Conda (Anaconda) or an OS-specific package. Full instructions are available here.
snap install dvc --classic
This corresponds to the latest tagged release. Add --beta for the latest tagged release candidate, or --edge for the latest master version.
pip install dvc
Depending on the remote storage type you plan to use to keep and share your data, you might need to specify one of the optional dependencies: s3, gs, azure, oss, ssh. Or all to include them all. The command should look like this: pip install dvc[s3] (in this case AWS S3 dependencies such as boto3 will be installed automatically).
To install the development version, run:
pip install git+git://github.com/iterative/dvc
Self-contained packages for Linux, Windows, and Mac are available. The latest version of the packages can be found on the GitHub releases page.
Ubuntu / Debian (deb)
sudo wget https://dvc.org/deb/dvc.list -O /etc/apt/sources.list.d/dvc.list sudo apt-get update sudo apt-get install dvc
Fedora / CentOS (rpm)
sudo wget https://dvc.org/rpm/dvc.repo -O /etc/yum.repos.d/dvc.repo sudo yum update sudo yum install dvc
Contributions are welcome! Please see our Contributing Guide for more details.
Want to stay up to date? Want to help improve DVC by participating in our occasional polls? Subscribe to our mailing list. No spam, really low traffic.
This project is distributed under the Apache license version 2.0 (see the LICENSE file in the project root).
By submitting a pull request to this project, you agree to license your contribution under the Apache license version 2.0 to this project.
Iterative, DVC: Data Version Control - Git for Data & Models (2020) DOI:10.5281/zenodo.012345.
Barrak, A., Eghan, E.E. and Adams, B. On the Co-evolution of ML Pipelines and Source Code - Empirical Study of DVC Projects , in Proceedings of the 28th IEEE International Conference on Software Analysis, Evolution, and Reengineering, SANER 2021. Hawaii, USA.
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