InstallationThe most challenging part of installation is, in most cases, to install the database. If you have any of the supported databases in use already, it should be easy to get the database manager to create the databases you need.If you get the chance to install the vendor database by yourself, the ClearQuest documentation offers step-by-step guidance for that. You can do this, of course, but you could also consider purchasing the setup from the vendor.ClearQuest is not installed to the database server, only to the clients.Installation of ClearQuest itself is a two-step process.
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Contents.IntroductionIf you are using ClearCase as your source control repository you may want to install the Eclipse ClearCase plug-in into CCS to enable you to perform ClearCase operations from within the CCS environment.In this article we are documenting two installation procedures depending on the ClearCase functionality you want to install in CCS. Please take the time to read carefully the following few paragraphs before selecting your installation method.Once you are clear which installation procedure is applicable for you then go for the detailed procedure in this article.In CCS/Eclipse the ClearCase functionality can be used in two slightly different ways that require different Eclipse plugins to be installed:.
ClearCase plugin: This is the way to go if you actually have the ClearCase software installed on your workstation/laptop. More information on the ClearCase plug-in is available at this on IBMs website. ClearCase Remote Client plugin: This is the way to go if you actually do not have the ClearCase software installed on your workstation/laptop and your ClearCase administrators, or the 'people in the know' tell you that you have to use the ClearCase Remote Client functionality. In this case do not install the regular ClearCase plugin but the CCRC plugin as described below.ClearCase Plugin Installation ProcedureThis is the installation procedure for the ClearCase Plugin, check the other installation procedure if what you need the Remote Client Plugin.DependenciesYou must have the ClearCase client software installed on your computer.CCSv4.x. CCSv4.0 and later are based on the Eclipse open source software framework.
The instructions below are for installing the plug-in for Eclipse 3.2 which is what CCSv4.0 is based on. If you are using a newer version of Eclipse the link in the overview section provides links to the plug-ins for newer versions of Eclipse.Procedure Obtain the ClearCase PluginThe plug-ins are called 'Adapters' on the IBM website. For CCSv4 download the Adapter for Eclipse 3.2. Download the correct plug-in from here: orThere you will find the plugins for Windows, Linux and Solaris platforms.Installation Instructions.
Download the zip file appropriate for your operating system. Extract the contents of the file to a directory in your file system. In Eclipse, select Help Software Updates Manage Configuration. In the Product Configuration window, click the 'Add an Extension Location' link in the Eclipse platform pane. The Browse for Folder dialog prompts you to choose an extension location, expand the My Computer entry and navigate to the directory that contains the contents of the extracted zip file. Expand the Eclipse folder and click OK.
The Install/Update dialog prompts you to restart the workbench. Click 'Yes'. In the Eclipse window, click Window Customize Perspective. In the Customize Perspective dialog box, click the Commands tab, ensure that the ClearCase' option under the Available command groups column is checked, and click 'OK'.Note: This installation procedure will NOT disable previous versions of the ClearCase SCM Adapter feature.
9.0.1.7/ June 20, 2019; 59 days ago ( 2019-06-20), (limited client)IBMWebsiteRational ClearCase is a family of tools that supports (SCM) of and other assets. It also supports design-data management of electronic design artifacts, thus enabling hardware and software co-development. ClearCase includes and forms the basis for configuration management at large and medium-sized businesses, accommodating projects with hundreds or thousands of developers.
It is developed by.ClearCase supports two configuration management models: UCM (Unified Change Management). UCM provides an out-of-the-box model while base ClearCase provides a basic infrastructure (UCM is built on base ClearCase). Both can be configured to support a wide variety of needs.ClearCase can accommodate large binary files, large numbers of files, and large repository sizes. It supports branching, labeling, and versioning of directories. Contents.History ClearCase was developed by and first released in 1992 on Unix and later on Windows. Some of the Atria developers had worked on an earlier, similar system: DSEE ( Software Engineering Environment) from. After bought in 1989, those developers left to form Atria.
Atria later merged with to form PureAtria. That firm was acquired by, which was purchased by IBM in 2003. IBM continues to develop and market ClearCase. In September 2016, IBM announced a strategic partnership with HCL Technologies that will allow for accelerated development.DSEE introduced many concepts that were adopted by ClearCase. The Apollo Domain file system allowed special handler programs to intervene during file access.
DSEE made use of this feature to invisibly substitute a versioned copy when a particular file was opened. With the versioning specification resident in the user environment, all accesses to versioned files were redirected, including such mundane accesses as printing, viewing in a generic text editor etc.DSEE relied heavily on a file that described all the software modules and their dependencies. The file had to be generated manually, which was a major impediment to its use in large systems. However, once generated, it enabled DSEE to calculate the optimum way to perform a build, re-using all modules that had previously been processed and whose version specifications matched the specifications for the build.DSEE also introduced the 'version spec,' which was called a 'thread.'
This was a list of possible versions that could be in the user environment or in a build. A major innovation was the use of build signatures and software release signatures in the thread.
The items in a thread might thus be:. Any copies reserved for editing (i.e. Checked out). The latest version (usually for developers only). A branched version of a file (a version on an alternate line of development). A labeled version (for developers working on a particular revision level). The version used in build XYZ.
The version used in software release x.y.z.Threads were processed from top to bottom for each file. A developer thread might have 'reserved' at the top, followed by a labeled version. For a fix to an existing release, the thread would be 'reserved', then the release signature.In the absence of the invisible file redirection of the Apollo Domain file system, ClearCase uses the virtual file system provided by the feature that is described below. The 'thread' concept corresponds to the dynamic view. Support for derived objects in a view is similar to DSEE's concept.Infrastructure The system that ClearCase uses is from.
In ClearCase terminology, an individual database is called a VOB ( Versioned Object Base). On this layer, maintenance takes place using Raima tooling. Around this layer, a set of interfaces with accompanying tools are used to manage the physical database system, which requires specific skills.The most important service is the Atria location Broker Daemon (ALBD), which manages all (LAN) communication between computers. Beginning with version 7, the server platform runs Websphere Application Server with a server application called the Change Management Server (CM Server), which served ClearCase clients via the HTTP Protocol.
(Before version 7 there was a web service by which users could access ClearCase via their browsers.) CM server has since been replaced by the ClearCase Remote Client Wide-Area Network Server (CCRC WAN server), which continues to be based on Websphere Application Server.Views A distinguishing feature of ClearCase is the (MVFS), a proprietary which can mount VOBs as a virtual file system through a, selecting a consistent set of versions and enabling the production of. This was a departure from the repository-and-sandbox model because it enabled the early management of artifacts (that is, before they are checked in) and was not limited to the management of these first-order configuration items.ClearCase also supports snapshot views, which are copies of repository data. As opposed to dynamic views, snapshot views are maintained on a local (OS-specific) file system and do not require network access. Instead, a snapshot view stores a copy of the VOB data locally on the user's computer. Snapshot views can be used while disconnected from the network and later synchronized with the VOB when a connection is reestablished. This mode of operation is similar to that of CVS (Concurrent Versions System) software.The dynamic and snapshot view types are supported by the ClearCase local client (CCLC).
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The ClearCase remote client (CCRC) supports analogous view types: the automatic view and the web view. Both are copy-based, but the automatic view uses the MVFS to support local, shareable pools of VOB objects.From the perspective of the client computer, a ClearCase view appears to be just another file system. New files and directories created in a ClearCase view are referred as 'view-private' to indicate that they are specific to the view and not version-controlled. This feature allows build systems to operate on the same file system structure as the source code and ensures that each developer can build independently of one other. At any time, a view-private object can be added to source control and become a versioned object, rendering it visible to other users.Developers typically have one or more views at their disposal.
It is sometimes practical to share views between developers, but sharing branches is the more common practice. A branch hierarchy is often useful: an entire development project can share a common development branch, while a smaller team can share a sub-branch, with each developer having his or her own private branch. Whenever a change on a branch is deemed stable enough, it can be merged to the parent branch.The configuration specification Under base ClearCase, each view is controlled by its associated configuration specification, commonly referred to as a config spec. This is a (stored internally in a text file, but compiled before use) that specifies what element versions (files or directories) are to be displayed in a view.
To determine which version, if any, of an element should be visible, ClearCase traverses the configuration specification line-by-line from top to bottom, stopping when a match is found and ignoring any subsequent rules. A configuration specification can also reference other configuration specifications by means of an 'include' statement.In the UCM management model, config specs do not need to be created or maintained manually: they are generated and maintained by ClearCase UCM operations.Builds The provided by MVFS allows for. Builds in views that use the MVFS can monitor and record file operations performed during the build process and associate each such event with the command that triggered it. This allows ClearCase to produce a which it calls a (CR) for all builds and enable for either purposes or as part of a larger process. Build auditing is performed with command-line tools such as a built-in make tools (, ) or by using the command, which can invoke another build tool, such as Unix make (1).The Versioned Object Base (VOB) that stores versions of file elements and directory elements also stores derived objects and metadata associated with these object types.The bill-of-materials artifact produced as the result of build auditing is known as the Configuration Record.
It contains:. The build procedure: The method (script, makefile, and so on) that invoked the build. Inputs: All files (and their specific versions) that were used for a particular build. Outputs: All (DO) files (and any dependent DOs) produced as a result of the build.The dependency information is stored in a configuration record that can be shown for each derived object.
The configuration record can be used to create another view that shows all files that have been previously read during the build time. The configuration record can also be used to apply a label to the files (and versions) that were read during the build.The MVFS allows derived objects that were built in one dynamic view to be automatically 'copied' to another dynamic view that requires 'exactly the same' derived object. Two derived objects are deemed to be 'exactly same' if they have the same configuration record (that is, bill of materials). The shareable derived objects are physically present in the VOB server, not in the views that reference them.
This feature is called winking in derived objects and requires that the clearmake or omake tool is used for builds.ClearCase dynamic views are slower than local filesystems, even with a good network infrastructure. Repeated subsequent builds may run faster, due to build avoidance that is enabled by ClearCase's substitute. Because MVFS requires server access every time a file is accessed, the performance of the file system depends on server capacity.Client types Originally, ClearCase supported only full ('fat') clients running native on Unix and Windows. In version 7, the ClearCase Remote Client (CCRC) was introduced.
IBM Rational ClearCase is ranked 3rd in Software Configuration Management with 1 review while IBM Rational ClearQuest which is ranked 4th in Software Configuration Management with 1 review. IBM Rational ClearCase is rated 7.0, while IBM Rational ClearQuest is rated 9.0. The top reviewer of IBM Rational ClearCase writes 'Great software version control tool, will it fly again?' On the other hand, the top reviewer of IBM Rational ClearQuest writes 'It can be adapted to any process flow'.
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IBM Rational ClearCase is most compared with IBM Rational ClearQuest, Git and GitHub, whereas IBM Rational ClearQuest is most compared with IBM Rational ClearCase, JIRA and IBM Engineering Workflow Management. OverviewIBM Rational ClearCase is an enterprise-grade configuration management system that provides controlled access to software assets, including requirements, design documents, models, test plans and test results. It be can be integrated with other IBM solutions, including IBM Rational Team Concert, IBM Rational ClearQuest, IBM Rational Asset Manager and IBM Rational Application Developer for WebSphere Software.IBM Rational ClearQuest is a fully customizable database workflow application development and production system.
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It provides flexible change and defect tracking, customizable processes, near real-time reporting and lifecycle traceability for better visibility and control of the software development lifecycle. IBM Rational ClearQuest provides scalable, multiplatform support to any size organization so you can continue to customize processes as your development needs evolve.