.NET tool vendor VSoft recently released the results of a survey among 400 VSoft customers on version control product usage. Microsoft Visual SourceSafe (VSS) remains at the top of the list, though its numbers declined since the 2005 survey. This may be due in part to customers migrating to Team Foundation Server (TFS), Microsoft's newest source control offering, though TFS is cost-prohibitive for many smaller development shops. Also nipping at the heels of VSS is Subversion, which is rapidly gaining popularity among .NET developers, particularly as SVN clients have improved integration with Visual Studio.
InfoQ Homepage News VSoft Releases Version Control Survey Results
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Version Control System Usage
by MIke Rowe,
Version Control System Usage
by MIke Rowe,
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It would be interesting to see additional metrics on the Version Control System Usage Survey. A couple of metrics that I think would be interesting seeing would include: SLOCs or some other metric of volume under control, check-ins per some unit of time, number of engineers(or others) using a system, number of released and supported versions of systems maintained under control, ...
As the size of a version control system increases, companies may be willing to pay more to obtain more features -- version control is pretty cheap considering the cost of developing and maintaining the code.