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.
DevOps Code ClearCase® network planning and administration
Starting and stopping DevOps Code ClearCase®
DevOps Code ClearCase® usually starts and stops when a DevOps Code ClearCase host starts up or shuts down, using the startup and shutdown conventions for the platform type. These topics describe how to stop or start DevOps Code ClearCase services manually.
Starting and stopping DevOps Code ClearCase® on the Linux system

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
    - Administrator responsibilities
      A DevOps Code ClearCase® administrator is typically responsible for host and network administration, data administration, user administration, and license administration.
    - Hosts and host administration
      DevOps Code ClearCase® is a distributed application with a client/server architecture. Many operations involve programs and data on more than one host. These topics describe the types of hosts you might have in your DevOps Code ClearCase community and explains how each type of host is used.
    - Licensing and license administration
      An administrator typically sets up license server hosts, administers license keys and establishes license use policies. Users typically configure licensing on their own computers when they install DevOps Code ClearCase®.
    - Data storage and data administration
      Repository maintenance is a critical aspect of DevOps Code ClearCase® administration.
    - Views
      All users in a DevOps Code ClearCase® community require access to one or more views to do their work.
    - User and group administration
      Access to VOBs and views is controlled by means of users and groups. When a DevOps Code ClearCase® application attempts an operation in a VOB or view, its credentials, which include the name and primary group of the user who started the application, are evaluated to determine whether the operation is permitted.
    - DevOps Code ClearCase® server processes
      DevOps Code ClearCase® is a distributed application. Many of its operations involve several host computers and several server processes on each host.
    - Server logs
      Each DevOps Code ClearCase® server process maintains a log on the host where it runs. Because an error returned by a command entered on the local host can generate a log entry on a remote host, DevOps Code ClearCase provides two remote log retrieval tools: the cleartool getlog command and the Server Logs node of the DevOps Code ClearCase Administration Console.
    - Starting and stopping DevOps Code ClearCase®
      DevOps Code ClearCase® usually starts and stops when a DevOps Code ClearCase host starts up or shuts down, using the startup and shutdown conventions for the platform type. These topics describe how to stop or start DevOps Code ClearCase services manually.
    - DevOps Code ClearCase® and network-attached storage devices
      Any network-attached storage (NAS) device can provide storage for ordinary files that are created and used by DevOps Code ClearCase® (release areas, for example, or the remote storage pools supported by DevOps Code ClearCase hosts running Linux or the UNIX system). In addition, several NAS devices can provide storage, when properly configured and used, for all VOB and view storage.
    - DHCP requirements
      DevOps Code ClearCase® is compatible with most DHCP configurations, although it has a few special requirements that you must be aware of.
    - Requirements for hosts with multiple network interfaces
      Hosts that have multiple network interfaces require additional configuration to work with DevOps Code ClearCase®.
    - DevOps Code ClearCase® and the NFS automounter
      DevOps Code ClearCase® is compatible with the NFS automount facility that is supported on Linux and the UNIX system, though certain guidelines apply.
  - 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.
  - 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

Starting and stopping DevOps Code ClearCase® on the Linux system

When the Linux system is started, systemd starts the clearcase service. This clearcase service does the following:

Starts the albd_server process of the host.
Performs additional setup tasks, such as mounting public VOBs.

The root user can stop or start DevOps Code ClearCase® using the systemctl command. For example:

# systemctl stop clearcase

Stops DevOps Code ClearCase®.

# systemctl start clearcase

Starts DevOps Code ClearCase®.