Does anyone still use ClearCase?
Daniel Rodriguez
Published Mar 18, 2026
Does anyone still use ClearCase?
Many teams still use it. But ClearCase’s popularity is dying. At one time, ClearCase was at the cutting edge of technology. Today, however, some of ClearCase’s technology can actually slow down development teams.
How does ClearCase work?
This tutorial will show you how to start working with Rational ClearCase.
- Roadmap for project managers.
- Roadmap for developers.
- Introduction.
- Documentation and learning resources.
- Workflow in Rational ClearCase projects.
- Working in the Rational ClearCase Explorer.
- Working at the command line.
- Creating VOBs.
What is IBM Rational ClearCase used for?
IBM Rational ClearCase provides controlled access to software assets, including code, requirements, design documents, models, test plans and test results.
What is the difference between Git and ClearCase?
Architecture is the biggest difference between ClearCase and Git. ClearCase is centralized while Git is distributed. ClearCase has a file-based architecture (where everything happens at the file level). And Git has a hash-based architecture (where everything happens at the branch level).
What is a VOB in ClearCase?
A VOB is a ClearCase repository that stores file and directory elements. A ClearCase view can have zero or more files or directories loaded from a VOB.
Is ClearCase a distributed version control?
While both GitHub and ClearCase are powerful source code management systems out there that make it easy to collaborate with others on a project, there are subtle differences between the two. For one, GitHub is based on Git which is a distributed version control system, whereas ClearCase is based on a centralized model.
What is ClearCase config spec?
A view’s config spec (configuration specification) contains an ordered set of rules for selecting versions of elements. Each time a reference is made to a file or directory element (either by ClearCase software or by standard programs), the config spec is used to select a particular version of the element.
How do I check in ClearCase files?
To be asked to confirm that you want to check in the files, select Tools > Options > Version Control > ClearCase, and then select the Prompt on check-in check box. By default, you are asked to enter a comment when checking files out or in.
What is ClearCase view?
A ClearCase view selects a specific set of file and directory versions from one or more VOBs so that you can load them, as ordinary files and folders, into a directory on your computer. This directory is called the view’s copy area.
What companies use ClearCase?
Who uses IBM Rational ClearCase?
| Company | Website | Country |
|---|---|---|
| The American Red Cross | redcross.org | United States |
| Lorven Technologies | lorventech.com | United States |
| CONFIDENTIAL RECORDS, INC. | confidentialrecordsinc.com | United States |
Who owns ClearCase?
IBM
Rational ClearCase
| Original author(s) | Atria Software |
|---|---|
| Developer(s) | IBM |
| Initial release | 1992 |
| Stable release | 9.1.0.1 / June 29, 2021 |
| Operating system | AIX, HP-UX, Linux, macOS, Solaris, Windows z/OS (limited client) |
What is UCM in ClearCase?
Unified Change Management (UCM) is a structured development process that is based on Rational ClearCase tools. A ClearCase UCM project defines how a group of people manage changes to resources, using baselines, activities, and streams. Members of a UCM project can work on one or more Eclipse projects.
What is the first edition of IBM ClearCase?
First Edition (December 2004) This edition applies to IBM Rational ClearCase and MultiSite Version 2003.06.00 and IBM Rational ClearQuest and MultiSite Version 2003.06.00. Some information about Version 06.13 is included.
Is there a clear case for IBM Rational ClearCase?
Front cover Software Configuration Management A Clear Case for IBM Rational ClearCase and ClearQuest UCM December 2004 International Technical Support Organization SG24-6399-00 © Copyright International Business Machines Corporation 2004. All rights reserved.
How do I perform a ClearCase operation on Windows?
Note: In general, you perform ClearCase operations on Windows in a view context, on a drive assigned with the Windows net use command, or by clicking Tools > Map Network Drive in Windows Explorer. It is rare to work directly on drive M, the default dynamic-views drive.
What are the known issues with the latest release of ClearCase?
The following known issues exist in this release: HP and AIX systems can be upgraded directly to this release only from ClearCase 8.0.1.x installations. To upgrade from any earlier release on these systems, ClearCase must be uninstalled first and then ClearCase 9.0 can be installed. This is due to a limitation of Installation Manager.
