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Fundamentals of Software Version Control

Exploring centralized vs. distributed systems


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Fundamentals of Software Version Control

with Michael Lehman

Video: Exploring centralized vs. distributed systems

As mentioned in the section about history of Version Control, there are two different kinds of version control: Centralized, and Distributed. The workflow between these two different kinds are somewhat different, so I thought it would be worthwhile to go over the way in which these things are actually used from the point of view of a user using version control. So first, we'll talk about centralized version control. Typically, in centralized version control, a system admin creates the repository because the repository is always remote. Then you have your local working set, and you add or check in files to the remote repository, and you check out or revert files to update your working set.
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  1. 2m 12s
    1. Welcome
      56s
    2. What you should know before taking this course
      23s
    3. Using the exercise files
      53s
  2. 25m 8s
    1. Overview of software version control
      2m 51s
    2. Understanding version control concepts
      5m 14s
    3. Demo one: Getting started
      11m 1s
    4. Demo two: Handling the "oops"
      6m 2s
  3. 11m 3s
    1. The history of version control
      3m 44s
    2. Terminology
      4m 27s
    3. Exploring centralized vs. distributed systems
      2m 52s
  4. 28m 42s
    1. Getting files in and out of a repository
      4m 38s
    2. Saving changes and tracking history
      2m 47s
    3. Reverting to a prior version
      1m 42s
    4. Creating tags and labels
      1m 5s
    5. Branching and merging
      4m 10s
    6. Exploring workflow integration and continuous builds
      2m 46s
    7. Using graphical user interface (GUI) tools
      2m 39s
    8. Integrating a version control system with an integrated development environment (IDE)
      2m 50s
    9. Examining shell integration
      3m 26s
    10. Looking at forward and reverse integration
      2m 39s
  5. 25m 59s
    1. Installation and setup
      3m 31s
    2. Creating a repository and a project
      5m 10s
    3. Working with check-in, checkout, and revert
      6m 12s
    4. Tagging
      1m 34s
    5. Branching and merging
      5m 32s
    6. Working with GUI clients and IDE integration
      4m 0s
  6. 16m 13s
    1. Installation and setup
      55s
    2. Working with check-in, checkout, and revert
      9m 34s
    3. Tagging
      1m 7s
    4. Branching and merging
      4m 37s
  7. 26m 41s
    1. Installation and setup
      3m 47s
    2. Creating a repository and a project
      6m 15s
    3. Working with check-in, checkout, and revert
      8m 31s
    4. Tracking history and tagging
      2m 15s
    5. Branching and merging
      5m 53s
  8. 19m 25s
    1. Installation and setup
      3m 1s
    2. Creating a repository and a project
      1m 6s
    3. Working with check-in, checkout, and revert
      6m 39s
    4. Tagging
      2m 13s
    5. Branching and merging
      3m 44s
    6. Working with GUI clients and IDE integration
      2m 42s
  9. 16m 54s
    1. Installation and setup
      1m 48s
    2. Creating a repository and a project
      59s
    3. Working with check-in, checkout, revert, and tracking history
      6m 9s
    4. Tagging
      1m 50s
    5. Branching and merging
      4m 29s
    6. Exploring GUI and shell integration
      1m 39s
  10. 3m 38s
    1. Selecting a software version control that is right for you
      2m 30s
    2. Next steps
      1m 8s

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Fundamentals of Software Version Control
2h 55m Intermediate Nov 07, 2012

Viewers: in countries Watching now:

This course is a gateway to learning software version control (SVC), process management, and collaboration techniques. Author Michael Lehman reviews the history of version control and demonstrates the fundamental concepts: check-in/checkout, forking, merging, commits, and distribution. The choice of an SVC system is critical to effectively managing and versioning the assets in a software development project (from source code, images, and compiled binaries to installation packages), so the course also surveys the solutions available. Michael examines Git, Perforce, Subversion, Mercurial, and Microsoft Team Foundation Server (TFS) in particular, describing the appropriate use, features, benefits, and optimal group size for each one.

Topics include:
  • Comparing centralized vs. distributed systems
  • Saving changes and tracking history
  • Using revert or rollback
  • Working with the GUI tools
  • Using IDE and shell integration
  • Installing different systems
  • Creating a repository
  • Tagging code
  • Branching and merging code
  • Selecting a software version control system that's right for you
Subjects:
Developer Mobile Apps Desktop Apps Programming Foundations
Software:
Git Mercurial ALM/TFS Perforce
Author:
Michael Lehman

Exploring centralized vs. distributed systems

As mentioned in the section about history of Version Control, there are two different kinds of version control: Centralized, and Distributed. The workflow between these two different kinds are somewhat different, so I thought it would be worthwhile to go over the way in which these things are actually used from the point of view of a user using version control. So first, we'll talk about centralized version control. Typically, in centralized version control, a system admin creates the repository because the repository is always remote. Then you have your local working set, and you add or check in files to the remote repository, and you check out or revert files to update your working set.

Similarly, another user using a centralized version control system will connect up to the remote repository and have a different working set. They will check out your files and updates that you've made and add their own, and this goes back and forth in this check in/check-out update loop as you work with Version Control. But in this case, in Centralized Version Control, everything is kept in the remote repository. Now, some benefits of that are that the system administrator can then keep track of updates, can manage backups, can do system rollbacks for all the developers at once.

But it tends to be somewhat fragile, and it also tends to be problematic when you can't get access to the centralized server, if the server is down, if you're on an airplane, it becomes kind of cumbersome. So it depends on the magnitude of your project and the magnitude of your team, whether centralized version control is right for you, and we'll look back at that at the end of the course, looking at all the different Version Control Systems, and exploring how you can determine what's the right one to use for your particular project. Distributed Version Control works a little bit differently.

Typically, you initialize the repository because the repository is on your local box. Similar to the Centralized Version Control, you still have a working set, and you add things and you update them. In addition, you can also have this optional remote repository, which is a way of backing things up. Now typically, people that use Git or Mercurial use a system like this, and they will use a hosted system like GitHub in order to be able to back up their local repository into the cloud, and that's done as we mentioned just before in terminology by using push and pull.

Similarly, if that remote repository is not in the cloud but on another developer system, you would use import and export to send the data back and forth between the repositories. So that's a little bit of a look at the differences between centralized and distributed version control. Next, we are going to jump into all the concepts in more detail about getting things in, getting things out, how the process of history tracking works, and all of the information that you need to understand before we begin to look at specific version control implementations.

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