1.1 General Requirements

Here is a list of general requirements for installing Rational ClearCase LT (or any Rational Suite Product) for the first time at your site.

  1. Make sure that you have a current backup of the Windows Registry and system directories on any host where ClearCase LT will be installed.

  2. Decide whether you will use node-locked or floating licenses. You must install Rational licenses to use Rational products. See the Rational Suite License Management Guide for general information about licenses, including the procedure for obtaining a license key. See Configuring ClearCase LT Licensing on page 8 for information specific to ClearCase LT licensing.

  3. The Rational Software Installation procedure uses C:\Program Files\Rational as the default install path for ClearCase LT software. The instructions in this guide assume that you are installing Windows applications on drive C. If this is not the case, substitute the appropriate drive when performing all procedures

  4. If drive C lacks sufficient free disk space, you can either specify another drive during the installation procedure or make space available on the default drive. Even if you choose another install path, some files must be installed on drive C. The Rational Software Setup program will report the amount of space required on all drives for your installation.

    After ClearCase LT has been installed, you can select any drive on the system to provide storage for ClearCase VOB and view data.

    NOTE: If you have already installed a Rational product, you cannot select an alternate location for another Rational product installation.

  5. The ClearCase LT installation requires specific versions of Microsoft files whether you are installing ClearCase LT for the first time or upgrading ClearCase LT from an earlier version. You can let the Rational Software Setup program install the files, or you can install the files from other sources.

  6. Rational Suite cannot be installed on a system that can boot multiple Windows NT, Windows 98, or Windows Me installations. You can install ClearCase LT on such a system, but you must install it in separate directories for each version of the operating system. For more information, see the Release Notes for Rational ClearCase LT.

  7. If you are using ClearCase LT with other products from the Rational Suite, all products must be from the same Suite version (installed from the same CD). For information about the order in which you should upgrade integrated products and convert schemas and data, see Configuring Rational Suite and the Release Notes for Rational Suite.

ClearCase LT Server and Client Hosts

ClearCase LT is a client/server product. A ClearCase LT community consists of a ClearCase LT server and one or more ClearCase LT clients. You may have multiple ClearCase LT communities at your site, but each client in a community can access only one ClearCase LT server. You can install a ClearCase LT client without installing a ClearCase LT server, but the client will not work until the server is installed and accessible by the client. The server host should be adequately configured. See Selecting a ClearCase LT Server Host on page 6.

Installing ClearCase LT server software on a host also installs ClearCase LT client software on that host. You do not need (and are not permitted) to install ClearCase LT client software on a ClearCase LT server. ClearCase LT client software is installed on the Clearcase LT server to simplify evaluation, administration, and troubleshooting. If you are part of a small workgroup, you may want to use the ClearCase LT server as a client too, but we recommend using a dedicated server whenever possible.

NOTE: ClearCase LT cannot be installed on a computer that is a Rational ClearCase host. If you have installed Rational ClearCase on any host that you intend to use as a ClearCase LT client or server, you must uninstall ClearCase on that host before you can install ClearCase LT.