Hardware and software requirements
See Change History for updates.
Supported file systems Table 1 lists the file systems that Rational ClearCase supports for view and VOB storage. If a file system is not listed in the table, it is not supported. Inform IBM Support for Rational products or your sales representative of any concerns you have about this list. Table 1. Supported file systems by platform | | Platform | Supported file systems | | HP-UX | JFS, UFS, HFS, VxFS | | HP-UX/IPF | JFS, UFS, HFS, VxFS | | IBM AIX | HFS, JFS, JFS2, GPFS1 | | Linux for x86 | ext2, ext3, reiserfs | | Linux for IBM S/390 and zSeries | ext2, ext3, reiserfs | | Solaris SPARC | UFS, VxFS (Veritas), ZFS | Footnote 1: Refer to technote 1409456 for GPFS support requirements.
The following file systems cannot be used to store any Rational ClearCase data on any platform: - Andrew File System (AFS(R))
- DCE Distributed File System (DFS(TM))
- Any memory-based file system (such as memFS, tmpFS, swapFS)
NFS support For a given platform, IBM supports the NFS implementations that the platform supports. If you use non-ClearCase access, see the IBM Rational ClearCase Administrator's Guide for a description of the limitations associated with use of NFS and potential workarounds.
Hardware requirements This section describes hardware requirements for installing and running the IBM Rational ClearCase and Rational ClearCase MultiSite software. Minimum requirements
Component(s) | Processor | Memory/Disk | Network | ClearCase server hosts Stand-alone CM Server1
No Web applications or other server processes installed | 2-4 CPU
128 processes on hosts running Linux or the UNIX system (Not applicable for Linux for IBM S/390 and zSeries) | 4-8GB RAM
80GB hard disk space
600 file descriptors per host (not per process) running Linux or the UNIX system | Wireless 802.11g
Wired connectivity 100MB Full Duplex (recommended) | Dedicated host with CM Server 1 ClearCase or ClearQuest Web applications installed. Also hosts other Rational services | Quad Core/CPU
128 processes on hosts running Linux or the UNIX system | 8GB RAM
80GB hard disk space
600 file descriptors per host (not per process) running Linux or the UNIX system | Wired connectivity to other ClearCase Servers 100MB Full Duplex (Gigabit recommended) | ClearCase client hosts | 1.5GHz 32-bit (x86) or 64-bit (x64) processor | RAM - 1GB (2GB recommended for Development machines)
40GB hard disk space | Wireless 802.11g
Wired connectivity 100MB Full Duplex (recommended) | Note: Processes and file descriptors per host running Linux or the UNIX system are set as kernel parameters. Footnote 1: For more detailed configuration information refer to technote 1327082 CM Server configuration guidelines for CCRC in ClearCase version 7.1 Disk space requirements for the release area
The file system of the networkwide release host must have sufficient disk space to hold the release area. The following list shows the minimum disk space required for release areas on different platforms for Rational ClearCase:
Disk space requirements for individual hosts
Disk space requirements for individual hosts shows the disk space requirement for each type of installation. All the space must be contained in a single disk partition. | Platform | Type of installation | ClearCase | | Solaris SPARC | Full copy | 1.99 GB | | Standard | 1.87 GB | | HP-UX 11 | Full copy | 1.83 GB | | Standard | 1.72 GB | | HP-UX/IPF | Full copy | 1.93 GB | | Standard | 1.82 GB | | IBM AIX | Full copy | 1.65 GB | | Standard | 1.56 GB | | Linux for x86 | Full copy | 1.77 GB | | Standard | 1.67 GB | | Linux for IBM S/390 and zSeries | Full copy | 1.59 GB | | Standard | 1.50 GB | | Linux on Power | Full copy | 1.96 GB | | Standard | 1.84 GB | | Windows | Full copy | 2.5 GB | | Standard | 600 MB |
In addition, any host that will have snapshot view directories needs enough disk space to contain all files loaded into the snapshot views and all view-private files added to the views. The amount of space required depends on the number and sizes of the files in the views. Any host that will have VOB- or view-storage directories must have enough disk space to contain the files and databases used for storage of VOB- or view-storage directories. The amount of space required depends on the characteristics and use of the VOBs and views.
Basic software requirements When installing ClearCase on Red Hat Enterprise Linux or SUSE Linux Enterprise Server, note that it may be necessary to have the kernel headers installed. Attempting to run the installation without the kernel headers installed could result in errors if precompiled MVFS modules are not available for the running kernel.
Required operating system patches Typically, correct Rational ClearCase operation depends on your having installed a number of required or recommended operating system patches. These are available from your hardware vendor. The operating system patches are cumulative. Therefore, if you install a more recent patch, it will include the fix required for Rational ClearCase. See Table 5 for a list of patches recommended or required for all hosts on which Rational ClearCase software runs. There may also be required layered packages, as listed in Layered software packages. In addition to the patches listed in Table 5, which fix problems known to affect ClearCase functionality, you may require other OS vendor patches to keep your systems functioning properly. Refer to the appropriate vendor web site for information on where to obtain these patches. If you use IBM Rational Rational ClearCase MultiSite, and you are upgrading from clearcase_p2003.06.00-13, or an earlier patch version, you must install the clearcase_p2003.06.00-21 or later user space patch version of Rational ClearCase on the ClearCase registry server machine before you install it on any other ClearCase machine. Failing to do so will result in runtime errors. Rational ClearCase MultiSite has no known dependencies on operating system patches. Table 5. Operating System Patches | | Patch number | Release | Purpose | Comments | Patches for Solaris SPARC | | 108727-06 or later | 8 | NFS patch | Required for Rational ClearCase servers that are NFS clients with NFS mounted VOB or view storage (typically using a NAS device). | | 108434-17 | 8 | Solaris 8 32-bit shared library patch for C++ | | | 109147-07 | 8 | SunOS 5.8 Linker patch | | | 111711-11 | 9 | Solaris 9 32-bit shared library patch for C++ | | | 112963-10 | 9 | SunOS 5.9 Linker patch | | | 120664-01 | 10 | Solaris 10 library patch | Required for running the ClearCase Web and ClearCase Remote Client servers. |  | | | | | Patches for HP-UX 11i (Series 700 and 800) | | Bundle11i | 11.11 (11i version 1.0) | Required bundle of kernel header files, B11.11.0102.n | Required for all Rational ClearCase hosts. | | PHKL_24253 | 11.11 | kernel thread "nostop" patches | Required for all Rational ClearCase hosts. | | PHKL_24254 | 11.11 | | PHKL_24255 | 11.11 | | PHKL_24256 | 11.11 | | PHKL_24257 | 11.11 | | PHNE_28983 | | ONC/NFS patch (part of kernel thread patch) | Required for all Rational ClearCase hosts. | | DeviceIDs11i | 11.11i | Device ID enablement patch bundle | Recommended for all Rational ClearCase hosts. | Patches for IBM AIX | | ML1 | 5.3 | | Required for all Rational ClearCase hosts. | Patches for SuSE Linux Enterprise Server | | SP3 kernel 2.4.21 | 8 | | Required for all Rational ClearCase hosts. |
Layered software packages In some cases, correct Rational ClearCase processing requires installation of a layered software package. Before installing Rational ClearCase on a host, see Table 6 to determine whether you need to install such a package. Table 6. Layered software packages required by Rational ClearCase | | Host type | Package name | Description | | Solaris SPARC | SUNWsprot | SPARC compilers, bundled tools; includes default make.rules file | | SUNWbcp | Binary compatibility | | SUNWscpr | Source compatibility, root | | SUNWscpu | Source compatibility, user | | SUNWmfrun | Motif Runtime kit to run Rational ClearCase GUIs | | HP-UX 11 | Upgrade. UPG-TLINK | Compatibility links for file system | | 11 X Window System: X11R6 (or later) | Window system |  Change History (click to expand) | |
| 3 November 2009 | Added footnote for AIX GPFS support | | 11 August 2009 | Added exclusion comment for CM Server processor | | 29 June 2009 | Added CM Server minimum requirements | | 5 February 2009 | Added Windows disk space requirements | | | | 
