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svnconfigurationmigrationclearcase

Advances on migration from ClearCase to SVN

I am a ClearCase user and abour to plan for ClearCase - SVN migration. The project is fairly large, there are branches and labels. Before starting a plan, I want to learn experiences about this migration.

  • Will this migration cause some data to be lost?
  • Is migrating all the history is efficient or has some problems?
  • Are there any efficient and experienced tools to migrate ClearCase to SVN?
Solution

  • The problem is that ClearCase is file-based (each checkin creates a new version for one file), and its labels are also file-based (you set a label on a file or files, not always all the files).

    As opposed to Subversion, which is repository-based, where each commit creates a new revision for the all repo content.

    You can try one free tool like Polarion SVN Importer (quite old 2010), to try and import the full history, but I usually:

    • only import the last relevant labels,
    • leave the ClearCase VOb in read-only mode for archive.