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IBM DevOps Code ClearCase

IBM DevOps Code ClearCase
Formerly IBM Rational ClearCase


What is IBM DevOps Code ClearCase?

An enterprise-grade configuration management system that provides controlled access to software assets.

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What is IBM DevOps Code ClearCase?

An enterprise-grade configuration management system that provides controlled access to software assets.

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Product Details

What is IBM DevOps Code ClearCase?

An enterprise-grade configuration management system that provides controlled access to software assets.

IBM DevOps Code ClearCase Technical Details

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Reviews and Ratings



(1-2 of 2)
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Score 3 out of 10
Vetted Review
Verified User
We used IBM Rational ClearCase as our platform for source control. We have recently migrated to use GIT - Stash instead. We may still have some groups in our organization that is still using ClearCase as their source control. IBM Rational ClearCase addresses the business problem of managing software versioning among multiple users.
  • Simple user interface.
  • When it works, it works.
  • Integrates well with Microsoft Visual Studios.
  • Extremely buggy.
  • Sometimes the repository gets locked for no reason.
  • Slow.
IBM Rational ClearCase might be better suited for a smaller / simpler code base. Larger code bases really slow it down... but then again there are better alternatives out there for source control.
  • Managed code versioning for many years.
  • Only one person can edit code at a time - slows processing down.
  • IBM is an expensive product to support.
  • sourcetree and Stash
GIT Stash is superior to IBM Rational ClearCase in many ways. Bundled with SourceTree, the UI is far more modernized and updated than IBM Rational ClearCase. Being able to visually see the individual branches that are created within the repository is much more straightforward than the versioning method of ClearCase. GIT also seems to be a lot faster when it comes to checking in/out code and creating the repository.
Score 6 out of 10
Vetted Review
Verified User
Rational ClearCase is used to store and version all source code files related to our 2.0 product and all client customized products based on 2.0. Rational ClearCase is integrated with Rational ClearQuest to track SDLC workflow and tie that workflow to changes in code.
  • Rational ClearCase is excellent for handling versioning and branching. No other tool I've used has the depth that ClearCase has when it comes to handling complex branching scenarios and identifying where certain versions of particular files are within a particular configuration.
  • Rational ClearCase handles parallel development of many dependent applications really well.
  • The use of ClearCase Views to switch between projects and configurations is extremely convenient as opposed to the local workstation model of the competitors.
  • ClearCase Mulitisite feels like a clunky solution for global development. The need to keep copies of the same VOBs in various location and keep them in sync by sending change packets across the network can be problematic at times. This systems seems to require a good bit of manual intevention when the VOBs miss a packet and get out of sync.
  • The learning curve can be overwhelming for new users.
  • The "Evil Twin" problem (where files with the same name are added to the same location, instead of versioning the same file) can be devestating to the system and can take days to fix. Unfortunately, I had this experience in my early days of ClearCase when somebody ran a script that inadvertantly created hundreds of "Evil Twin" files. The system was inaccesible for days as I worked to resolve this issue. It shouldn't be that easy to mess up the system so badly.
Rational ClearCase is well suited for a company where development is done from one single location and there are a lot of dependent projects, systems or modules that need to be version controlled. Especially good for a company that creates customized software for clients. Well suited for disciplined development environments. Waterfall methodology mentality seems a better fit for ClearCase than Agile. ClearCase is not well suited for companies that have development geographically distributed and using Agile Methodologies.
  • The number of bugs in a release has been down 45% since using ClearCase and ClearQuest
  • A ClearCase Administrator/Guru is required on site. Add $75,000 - $100,000 in the annual budget for that.
  • On time releases are up 35% since using ClearCase and ClearQuest
If development is centrallized to one location and your company releases hundreds of customized versions of your software per year, then ClearCase is the best tool for managing the complexity of multiple versions of customized software. If your company has globally distributed development, then I'd recommend Team Foundation Server over ClearCase. If your organization uses Agile Methodologies, then I'd recommend TFS with GIT.
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