Version Control Systems: What They Are and Why They Matter?

version control systems

In the world of software development, version control systems (VCS) have revolutionized the way developers and teams collaborate on projects. One of the most popular VCS is Git, a distributed version control system that has become the de facto standard for version control. Git allows developers to work on the same code base simultaneously, with changes tracked in real time.

In this article, you will get an overview of version control systems, including their different types and benefits. Let’s delve into Git and explore how it has become the go-to VCS for software development. 

By the end of this article, you’ll have a comprehensive understanding of version control systems and why they matter in software development.

What is a VCS?

Version control systems (VCS) are software tools that help developers manage changes to their source code over time. VCS tracks modifications made to files, including who made the changes and when allowing developers to quickly revert to a previous version or compare changes between different versions. This technology has revolutionized software development, making it easier for developers to collaborate on projects, maintain code quality, and improve productivity.

There are two main types of VCS: local and distributed. 

Local VCS stores changes made to files on a local computer, while distributed VCS stores changes made to files on a remote server and allows developers to work on the same codebase simultaneously. Git is the most popular distributed VCS and has gained widespread adoption among developers and companies worldwide.

A study by JetBrains found that implementing a VCS can significantly improve the speed and quality of software development. The study revealed that Git is one of the predominant version control systems (93% of developers surveyed use Git), and code review tools can be differentiated by the VCSs they support. In addition, teams using VCS could deploy code changes faster than those not using VCS.

Examples of popular VCS software include Git, Subversion, and Mercurial. Git has become the de facto standard for version control in modern software development due to its speed, flexibility, and robust features. Git is open-source and can be used on various operating systems, making it a popular choice for individual developers and large corporations. Learn Git from Lavanya Mohan by checking the courses at Thrive Academy.

VCSs are essential for managing software development projects effectively. They help teams collaborate more efficiently, maintain code quality, and improve productivity. Local and distributed VCSs have unique pros and cons, and choosing the right one depends on the project’s specific needs. Git is the most popular distributed VCS and has proven to be a reliable tool for managing software projects, with many companies adopting it as their primary VCS.

Types of VCS

intoduction to git
Image Source: Pixaybay

Version control systems come in two main types: local and distributed. Each type has its advantages and disadvantages, and the choice of which to use will depend on the development team’s needs.

Local Version Control Systems (LVCS) 

They are centralized systems that rely on a single database stored on a local machine. They are simple to use and can handle small projects effectively, but they need the scalability and collaboration features required for larger software projects. One of the most famous examples of an LVCS is RCS (Revision Control System).

Distributed Version Control Systems (DVCS) 

They are more complex than LVCS but offer several advantages, such as the ability to handle large projects and support team collaboration. In DVCS, every user has a copy of the repository on their local machine, making it easier to work on multiple branches simultaneously. The most popular DVCS is Git, which many companies, including Microsoft, Facebook, and Google, use.

According to a recent survey, Git is the most widely used VCS, with 87.6% of developers reporting that they use it in their work. This is likely due to its ease of use, speed, and flexibility, as well as its ability to support distributed workflows.

Many companies use version control systems to manage their software projects. For example, Google uses a custom-built VCS called Piper, which is based on Git, to manage its massive codebase. Facebook also uses a customized version of Git, called Buck, to build and deploy its applications. Other companies, such as Microsoft and Apple, use a combination of Git and other VCS to manage their projects.

Choosing the right type of VCS is crucial for effective software development. While LVCS may be sufficient for small projects, DVCS is the clear choice for larger projects or those requiring team collaboration. Git, in particular, has become the industry standard for VCS, with its widespread adoption and support from major companies.

Benefits of Version Control

Using VCS in software development can improve team collaboration, reduce errors, and ensure code quality. It also provides best practices for using VCS effectively.

1. Collaboration

VCS allows teams to work together on a project, with the ability to track changes made by each team member. This makes it easier to manage large projects and reduces the risk of conflicting changes.

2. Error Reduction

With VCS, it’s easier to catch and correct errors in code. If an error is discovered, VCS allows developers to roll back to a previous version of the code, making it easier to identify where the problem originated.

3. Code Quality

VCS promotes good coding practices, such as using descriptive commit messages and documenting changes. This helps maintain the overall quality of the codebase.

4. Productivity

VCS streamlines the process of making and tracking changes to the code, saving time and improving productivity.

5. Backup and Disaster Recovery

VCS acts as a backup of the codebase, allowing for easy recovery in case of any risk or failure, such as a hard drive failure. VCS also keeps track of changes made to the code over time, making it easier to identify when a problem was introduced and to revert to a previous version if needed.

6. Historical tracking

VCS provides a historical record of changes made to the codebase over time. This allows developers to understand the evolution of the codebase, track the progress of features, and identify who made changes and when.

Best practices for VCS include committing changes frequently, using descriptive commit messages, and using branching and merging to manage complex code changes. By implementing VCS, teams can reap these benefits and improve their software development processes. 

These benefits have been observed by various software development companies, such as:

1. Atlassian

Atlassian is a software development company that uses VCS to manage its codebase. They have reported that VCS has helped them maintain code quality, reduce errors, and streamline their development processes.

2. Spotify

The popular music streaming service also uses VCS to manage its codebase. They have reported that VCS has helped them maintain version control, collaborate effectively, and improve the overall quality of their code.

Using a VCS in software development provides several benefits that improve collaboration, reduce errors, and ensure code quality. Following best practices for VCS, such as frequent commits and descriptive commit messages, can further enhance these benefits.

Source Control in Programming

Source control, also known as version control, is a crucial aspect of software development. It manages and tracks changes to code, documentation, and other digital assets. This section will explain the concept of source control and its relationship with version control.

There are two main types of source control systems: centralized and distributed. 

  • Centralized source control involves storing code in a central repository, with developers checking out and modifying files as needed. 
  • Distributed source control, on the other hand, allows developers to create local repositories and make changes independently before merging them back into the central repository.

One popular distributed source control system is Git. Git provides many benefits to software development teams, including working offline and quickly creating and merging branches for different features or bug fixes. Additionally, Git’s distributed nature makes it easier to collaborate with remote team members or contribute to open-source projects.

Regardless of the type of source control system used, it is essential to follow best practices, such as committing changes frequently, writing descriptive commit messages, and using branching strategies to manage complex projects.

Source control is a critical component of software development, and choosing the right system can significantly impact team productivity and code quality. While centralized and distributed source control systems have advantages and disadvantages, tools like Git have become increasingly popular due to their ease of use and powerful features.

Why Use a Version Control System?

In software development, failure to use a version control system (VCS) can pose significant risks to a project. Without a VCS, developers may encounter the following challenges:

1. Loss of data

When code changes are made without a VCS, it can be challenging to keep track of who made the changes and when. This can lead to losing necessary code, especially if files are accidentally deleted or overwritten.

2. Difficulty in collaboration

With a VCS, developers may avoid difficulties collaborating on code. It can be challenging to merge changes made by multiple team members, leading to conflicts and errors.

Increased risk of errors: Changing code without a VCS can increase the risk of errors. It is easy to lose track of changes, leading to mistakes that can be difficult to identify and correct.

Git, a popular VCS tool, can help mitigate these risks. By using Git, developers can:

1. Track changes

Git provides a detailed history of all changes made to a codebase, allowing developers to track who made changes quickly and when.

2. Collaborate more effectively

Git’s branching and merging capabilities make it easy for multiple developers to work on the same codebase simultaneously, reducing the risk of conflicts and errors.

3. Ensure code quality

Git provides tools for reviewing code changes before they are merged into the main codebase, reducing the risk of errors and ensuring code quality.

Using a VCS like Git is essential for mitigating the risks associated with software development. By providing a comprehensive history of changes, facilitating collaboration, and ensuring code quality, Git can help teams work more efficiently and effectively.

VCSs are a crucial aspect of software development that enable teams to collaborate more effectively, reduce errors, and ensure code quality. This article has explored the different types of VCS, their advantages and disadvantages, and real-world examples of companies using them. We have also discussed the concept of source control and the importance of using VCS in software development. 

By leveraging VCS, individuals and teams can streamline their development process and ensure that their code is always functional. It is essential to incorporate VCS into software development workflows to improve the overall quality of the code and ensure project success.


Version control systems are an essential tool for software development teams. They allow developers to work collaboratively, manage code changes, and maintain high code quality standards. VCS provides numerous benefits, including error reduction, backup and disaster recovery, and historical tracking.

Developers and teams should prioritize using a version control system like Git to improve their software projects’ quality and efficiency. By following best practices and leveraging the features of VCS, teams can work more effectively and produce better software.


How does version control work?

Version control is a software tool that tracks and manages changes made to code over time. It allows developers to keep a record of each change, revert to earlier versions, and collaborate with team members. Examples of version control systems include Git, SVN, and Mercurial.

Why use a version control system?

Version control systems offer several benefits for software development, including improved collaboration, reduced errors, better code quality, and the ability to track changes over time. They also allow for more accessible code reviews and facilitate code sharing between team members.

Where is the version control system used?

Version control systems are used in a wide variety of software development projects, including web and mobile applications, game development, and enterprise software. They are also used in open-source projects and can benefit individual developers working on personal projects.

What type of version control system (VCS) is Git?

Git is a distributed VCS, meaning each team member has a copy of the entire codebase on their local machine. This allows for more flexibility and easier collaboration, as team members can work offline and merge their changes with the main codebase when ready. Git is one of the most popular VCSs in use today, with many large companies and open-source projects relying on it for their development workflows.

What is the difference between local and distributed version control systems?

Local version control systems store changes made to code on a local machine, often using a simple database or file system. Distributed version control systems, on the other hand, store a copy of the entire codebase on each team member’s machine, allowing for more flexibility and easier collaboration. Git is an example of a distributed version control system, while SVN is an example of a centralized version control system.

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