Welcome
Administering
Learn how to administer the product.
Administering DevOps Code ClearCase®
Learn about performing administrative tasks for a DevOps Code ClearCase® community including managing software licenses, user and group accounts, ClearCase server and client hosts, shared data, and the network that connects them.
Administering the DevOps Code ClearCase® registry
The DevOps Code ClearCase® registry is a central repository of information about shared resources such as VOBs and views.
The registry server host
The DevOps Code ClearCase® registry is an integral part of most DevOps Code ClearCase operations, so the registry server host must be stable, available, and accessible to all hosts in the network.
Defining a DevOps Code ClearCase® registry host
You can define a DevOps Code ClearCase® registry host during or after the site preparation process.
Defining a computer running Linux or the UNIX system as a registry host
You can define an existing DevOps Code ClearCase® host that is running Linux or the UNIX system to become a registry server.

Overview
Learn general information about the product.
Installing
Learn how to install the product.
Upgrading and migrating
Learn how to upgrade and migrate data for the product.
Administering
Learn how to administer the product.
- Administering DevOps Code ClearCase®
  Learn about performing administrative tasks for a DevOps Code ClearCase® community including managing software licenses, user and group accounts, ClearCase server and client hosts, shared data, and the network that connects them.
  - DevOps Code ClearCase® network planning and administration
  - License servers and license administration
    Most DevOps Code ClearCase® applications and commands (cleartool commands, for example, or GUIs such as the ClearTeam Explorer) require a license to run.
  - Reconfiguring ClearCase® to use a different JRE
    When you change the Java Runtime Environment (JRE) for DevOps Code ClearCase®, you must reconfigure the product to make it work with the new JRE.
  - Administering the DevOps Code ClearCase® registry
    The DevOps Code ClearCase® registry is a central repository of information about shared resources such as VOBs and views.
    - Registry data
      An understanding of the registry data model is important for many administrative procedures.
    - The registry server host
      The DevOps Code ClearCase® registry is an integral part of most DevOps Code ClearCase operations, so the registry server host must be stable, available, and accessible to all hosts in the network.
      - Defining a DevOps Code ClearCase® registry host
        You can define a DevOps Code ClearCase® registry host during or after the site preparation process.
        Defining a computer running Linux or the UNIX system as a registry host
        You can define an existing DevOps Code ClearCase® host that is running Linux or the UNIX system to become a registry server.
        Defining a Windows® computer as a registry host
        You can define an existing DevOps Code ClearCase® host that is running Windows to become a registry server.
      - Setting and using the DevOps Code ClearCase® registry password
        Because registry changes can have a significant impact on a DevOps Code ClearCase® community, some registry operations are protected by the registry password.
      - The registry client list
        You can use the registry client list to determine which DevOps Code ClearCase® hosts are clients of a specific registry server.
    - Guidelines for using multiple DevOps Code ClearCase® registries
      You can configure multiple DevOps Code ClearCase® registries if you need to limit VOB and view access to specific clients.
    - Assigning a DevOps Code ClearCase® host's registry and region
      Use this procedure to assign a DevOps Code ClearCase® host to a new registry server, a new registry region, or both.
    - Managing registry data
      Registry data for most common operations is managed automatically. Other operations can require an administrator to create, remove, or modify registry data.
    - Registry administration guidelines
      Ensuring the integrity of registry data is an essential task for any DevOps Code ClearCase® administrator.
    - DevOps Code ClearCase® registry backup and switchover
      DevOps Code ClearCase® provides tools that enable you to configure one or more backup registry hosts. A backup registry host can take over when a registry server fails.
  - DevOps Code ClearCase® network administration in mixed environments
    A DevOps Code ClearCase® environment that includes hosts that run Windows and hosts that run the UNIX system or Linux is said to be a mixed environment.
  - Overview of security considerations
    As an administrator, you are responsible for the security of your DevOps Code ClearCase® deployment.
  - VOB and view access control
    DevOps Code ClearCase® supports a rich set of access controls on versioned objects.
  - VOB administration
    Because VOBs are the principal repository for artifacts under DevOps Code ClearCase® control, VOB administration is one of the DevOps Code ClearCase administrator’s most important tasks.
  - VOB datatypes and administrative VOB hierarchies
    There are many types of VOB metadata. Some are unique to a particular VOB, but many must be managed consistently across a group of VOBs that store related artifacts (components of a UCM project, for example). These topics introduce VOB metadata and describe how to use administrative VOB hierarchies to simplify sharing of type objects among related VOBs.
  - Moving VOBs and relocating VOB data
    DevOps Code ClearCase® includes tools for moving data and metadata to another VOB and for moving entire VOBs to another disk or host. You may need to use these tools to reorganize VOB directories, redistribute data storage, or rebalance server loads.
  - Views and view administration
    A view provides a workspace where users access versions of file and directory elements that are under DevOps Code ClearCase® control. Views can also contain view-private file system objects (such as ordinary files and directories) that are not under DevOps Code ClearCase control.
  - Backing up critical DevOps Code ClearCase® data
    Like all databases, VOBs, views, and the DevOps Code ClearCase® registry have special backup and restore requirements.
  - Restoring critical DevOps Code ClearCase® data
    If you have implemented a sound backup strategy for DevOps Code ClearCase® data, it should be easy to restore that data, if necessary.
  - Periodic maintenance
    Periodic attention to storage management and repository integrity is an important administrative function. These topics describe VOB and view storage management tasks, the checkvob utility, and the DevOps Code ClearCase® scheduler, which you can use to automate many periodic maintenance chores.
  - Importing data
    DevOps Code ClearCase® includes several utilities for importing data from other configuration management systems or directly from the file system itself.
  - Troubleshooting
    These topics cover a variety of procedures that administrators might need to follow to find and fix problems.
  - Improving client host performance
  - Improving VOB host performance
  - Configuring cross-platform file-system access
  - DevOps Code ClearCase® and Windows domains
  - Configuring non-ClearCase® access on Linux® or the UNIX system
    You can configure a DevOps Code ClearCase® host running Linux® or the UNIX system to support access to VOBs and dynamic views from computers that do not run DevOps Code ClearCase.
  - Configuring DevOps Code ClearCase® for high availability
  - Estimating VOB size
    If you can estimate the number of elements, versions, and derived objects that a VOB will ultimately contain, you can compute a very rough estimate of the size of a VOB that can accommodate them. VOB storage includes a database and pools. On Windows®, the database and pools must reside on a single disk partition. On Linux® or the UNIX system, the pools can be located on a different partition or host, using symbolic links.
  - Administering the CCRC WAN server
  - About CCRC WAN server parallel view loading
  - Administering and using CMI task-provider integrations
    DevOps Code ClearCase® supports integrations with task providers such as Rational® ClearQuest®, Rational Team Concert (RTC), and Atlassian Jira through the Change Management Interface (CMI).
- Administering platforms for DevOps Code ClearCase®
  Learn how to perform DevOps Code ClearCase® administrative tasks on supported platforms.
- Administering DevOps Code ClearCase® MultiSite
  Learn to configure and manage the DevOps Code ClearCase® MultiSite and Rational® ClearQuest® MultiSite environments to support development activities at different locations.
Developing
Learn how to develop software with DevOps Code ClearCase® and ClearCase Remote Client.
Managing change and releases
Learn how to manage change and release in the product.
Integrating
Learn how to integrate DevOps Code ClearCase® with other products.
Tutorials
Complete tutorials with specific learning objectives for the product.
Extending product function
Learn how to extend the product.
Reference
Review reference information for the product.
Glossary

Defining a computer running Linux or the UNIX system as a registry host

You can define an existing DevOps Code ClearCase® host that is running Linux or the UNIX system to become a registry server.

About this task

To define a computer running Linux or the UNIX system as a registry host.

Log on to the host. You must log in as root to have privileges to stop or start DevOps Code ClearCase®, or to create directories and files in the /var partition of most hosts.
Stop DevOps Code ClearCase®.
Create the file /var/adm/devops/clearcase/config/rgy_svr.conf. This file must contain only one line, consisting of the text string master.
Restart DevOps Code ClearCase®.

Note: After you define a new registry host, you must establish a registry password for the new registry. Otherwise, you cannot perform any privileged registry operations, such as creating public VOB tags or changing site-wide defaults. For more information, see Setting and using the DevOps Code ClearCase registry password.