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Software Configuration Management: Under the Hood of Two Leading Tools

Software Configuration Management: Under the Hood of Two Leading Tools. Presented by: Andrew Wheeler & Shane Marcus. Agenda. Project Motivation CM Tools Investigated ClearCase Subversion (SVN) Comparison Future Work. Project Motivation.

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Software Configuration Management: Under the Hood of Two Leading Tools

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  1. Software Configuration Management: Under the Hood of Two Leading Tools Presented by: Andrew Wheeler & Shane Marcus

  2. Agenda • Project Motivation • CM Tools Investigated • ClearCase • Subversion (SVN) • Comparison • Future Work

  3. Project Motivation • Critical to software projects survival and completion • A means of document control • CMMI’s demands • Good SCM decisions can lead to a streamlining of the process • Most popular SCM tools covered

  4. ClearCase Background • Initiated from DSEE • Domain Software Engineering Environment • Atria Software (Early ’90s) • Initially Released to UNIX Platforms • Windows Support Came Later • Rational – Tool Alignment • IBM Buyout

  5. Subversion (SVN) Background • Shell Scripts Written by Dick Grune • Resolve Conflicted Code • Merge Two Files • Brian Berliner Transformed Scripts (’89) • CVS was Born • Subversion – Derived from CVS • Marketed as a Compelling Replacement to CVS • Built by CollabNet, Inc.

  6. Ease of Deployment Cost Comparison Areas Evaluation Networking Atomic Commits Directory Support File Support Remote Repository

  7. Differences in Comparison

  8. Related Work • User Driven Evaluation • Rose-Hulman Institute of Technology • Used as repository for course materials and collaboration source among professors • Feedback to students on coursework through SVN • Collaboration among teams and backup structure for students

  9. Related Work (cont) • Collaboration and SCM • COVEN • Presents key issues facing current SCM tools • Branching and Merging • Revision history and Reverting • Labeling and Tagging

  10. Future Work • Perform study of software projects who use SCM tools • Collect needs through surveys and rate them against the features of a given SCM tool • Collect metrics on how quickly a project can setup a repository structure • Collect metrics on how much time is spent performing a given activity with the same amount of SLOC changes per SCM tool • Compare SCM tool usage to staff size

  11. Conclusion • ClearCase vs. Subversion (SVN) • Feature Sets Nearly the Same • Proprietary vs. Open Source • Significant Cost Difference • Initial Setup Time • Difficult to Eliminate Biases • Restricted Evaluation / Training Opportunity • ClearCase On-line Only Evaluation • Relied on Work Exposure to Product

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