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diff --git a/doc/user/project/import/clearcase.md b/doc/user/project/import/clearcase.md new file mode 100644 index 00000000000..f23623ed485 --- /dev/null +++ b/doc/user/project/import/clearcase.md @@ -0,0 +1,47 @@ +# Migrating from ClearCase + +[ClearCase](https://www-03.ibm.com/software/products/en/clearcase/) is a set of +tools developed by IBM which also include a centralized version control system +similar to Git. + +A good read of ClearCase's basic concepts is can be found in this [StackOverflow +post](https://stackoverflow.com/a/645771/974710). + +The following table illustrates the main differences between ClearCase and Git: + +| Aspect | ClearCase | Git | +| ------ | --------- | --- | +| Repository model | Client-server | Distributed | +| Revision IDs | Branch + number | Global alphanumeric ID | +| Scope of Change | File | Directory tree snapshot | +| Concurrency model | Merge | Merge | +| Storage Method | Deltas | Full content | +| Client | CLI, Eclipse, CC Client | CLI, Eclipse, Git client/GUIs | +| Server | UNIX, Windows legacy systems | UNIX, macOS | +| License | Proprietary | GPL | + +_Taken from the slides [ClearCase and the journey to Git](https://www.open.collab.net/media/pdfs/ClearCase-and-the-journey-to-Git.pdf) provided by collab.net_ + +## Why migrate + +ClearCase can be difficult to manage both from a user and an admin perspective. +Migrating to Git/GitLab there is: + +- **No licensing costs**, Git is GPL while ClearCase is proprietary. +- **Shorter learning curve**, Git has a big community and a vast number of + tutorials to get you started. +- **Integration with modern tools**, migrating to Git and GitLab you can have + an open source end-to-end software development platform with built-in version + control, issue tracking, code review, CI/CD, and more. + +## How to migrate + +While there doesn't exist a tool to fully migrate from ClearCase to Git, here +are some useful links to get you started: + +- [Bridge for Git and ClearCase](https://github.com/charleso/git-cc) +- [Slides "ClearCase and the journey to Git"](https://www.open.collab.net/media/pdfs/ClearCase-and-the-journey-to-Git.pdf) +- [ClearCase to Git](https://therub.org/2013/07/19/clearcase-to-git/) +- [Dual syncing ClearCase to Git](https://therub.org/2013/10/22/dual-syncing-clearcase-and-git/) +- [Moving to Git from ClearCase](https://sateeshkumarb.wordpress.com/2011/01/15/moving-to-git-from-clearcase/) +- [ClearCase to Git webinar](https://www.brighttalk.com/webcast/11817/162473/clearcase-to-git) |