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Data Version Control or DVC is an open-source tool for data science and machine learning projects. Key features:

  1. simple command line Git-like experience. Does not require installing and maintaining any databases. Does not depend on any proprietary online services;
  2. it manages and versions datasets and machine learning models. Data is saved in S3, Google cloud, Azure, Alibaba cloud, SSH server, HDFS or even local HDD RAID;
  3. it makes projects reproducible and shareable, it helps answering question how the model was build;
  4. it helps manage experiments with Git tags or branches and metrics tracking;

It aims to replace tools like Excel and Docs that are being commonly used as a knowledge repo and a ledger for the team, ad-hoc scripts to track and move deploy different model versions, ad-hoc data file suffixes and prefixes.

Contents

How DVC works

We encourage you to read our Get Started to better understand what DVC is and how does it 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.

  1. Git/Git-lfs part - DVC helps you storing and sharing data artifacts, models. It connects them with your Git repository.
  2. Makefiles part - DVC describes how one data or model artifact was build from another data.

DVC usually runs along with Git. Git is used as usual to store and version code and 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 data files cache DVC supports remotes - any cloud (S3, Azure, Google Cloud, etc) or any on-premise network storage (via SSH, for example).

how_dvc_works

DVC pipelines (aka computational graph) feature connects code and data together. In a very explicit way you can specify, run, and save information that a certain command with certain dependencies needs to be run to produce a model. See the quick start section below or check Get Started tutorial to learn more.

Quick start

Please read Get Started for the full version. Common workflow commands include:

Step Command
Track data
$ 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
Share code
$ 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

Installation

Read this instruction to get more details. There are three options to install DVC: pip, Homebrew, or an OS-specific package:

pip (PyPI)

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_remotes to include them all. The command should look like this: pip install dvc[s3] - it installs the boto3 library along with DVC to support the AWS S3 storage.

To install the development version, run:

pip install git+git://github.com/iterative/dvc

Homebrew

brew install iterative/homebrew-dvc/dvc

or:

brew cask install iterative/homebrew-dvc/dvc

Package

Self-contained packages for Windows, Linux, Mac are available. The latest version of the packages can be found at 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

Arch Linux (AUR)

Unofficial package, any inquiries regarding the AUR package, refer to the maintainer.

yay -S dvc

Related technologies

  1. Git-annex - DVC uses the idea of storing the content of large files (that you don't want to see in your Git repository) in a local key-value store and uses file hardlinks/symlinks instead of the copying actual files.
  2. Git-LFS - DVC is compatible with any remote storage (S3, Google Cloud, Azure, SSH, etc). DVC utilizes reflinks or hardlinks to avoid copy operation on checkouts which makes much more efficient for large data files.
  3. Makefile (and its analogues). DVC tracks dependencies (DAG).
  4. Workflow Management Systems. DVC is a workflow management system designed specifically to manage machine learning experiments. DVC is built on top of Git.
  5. DAGsHub Is a Github equivalent for DVC - pushing your Git+DVC based repo to DAGsHub will give you a high level dashboard of your project, including DVC pipeline and metrics visualizations, as well as links to DVC managed files if they are in cloud storage.

Contributing

Contributions are welcome! Please see our Contributing Guide for more details.

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Mailing List

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.

Copyright

This project is distributed under the Apache license version 2.0 (see the LICENSE file in the project root).

By submitting a pull request for this project, you agree to license your contribution under the Apache license version 2.0 to this project.