• Oct 22, 2010: xCAT 2.5 released.
  • Apr 30, 2010: xCAT 2.4 is released.
  • Oct 31, 2009: xCAT 2.3 released.
    xCAT's 10 year anniversary!
  • Apr 16, 2009: xCAT 2.2 released.
  • Oct 31, 2008: xCAT 2.1 released.
  • Sep 12, 2008: Support for xCAT 2
    can now be purchased!
  • June 9, 2008: xCAT breaths life into
    (at the time) the fastest
    supercomputer on the planet
  • May 30, 2008: xCAT 2.0 for Linux
    officially released!
  • Oct 31, 2007: IBM open sources
    xCAT 2.0 to allow collaboration
    among all of the xCAT users.
  • Oct 31, 1999: xCAT 1.0 is born!
    xCAT started out as a project in
    IBM developed by Egan Ford. It
    was quickly adopted by customers
    and IBM manufacturing sites to
    rapidly deploy clusters.

xCAT has moved!

xCAT Linux/Ubuntu support from version 2.11 has moved to and GitHub.
For older xCAT releases and AIX support, continue to use this site.
To report bugs or request features, open an Issue over in GitHub:

What is xCAT?

xCAT is Extreme Cluster/Cloud Administration Toolkit, xCAT offers complete management for HPC clusters, RenderFarms, Grids, WebFarms, Online Gaming Infrastructure, Clouds, Datacenters, and whatever tomorrow's buzzwords may be. It is agile, extensible, and based on years of system administration best practices and experience. It enables you to:

  • Provision Operating Systems on physical or virtual machines: RHEL, CentOS, Fedora, SLES, Ubuntu, AIX, Windows, VMWare, KVM, PowerVM, PowerKVM, zVM.
  • Provision using scripted install, stateless, statelite, iSCSI, or cloning
  • Remotely manage systems: lights-out management, remote console, and distributed shell support
  • Quickly configure and control management node services: DNS, HTTP, DHCP, TFTP, NFS

xCAT Differentiators

  • xCAT Scales - Beyond all IT budgets. 1,000s of nodes with distributed architecture
  • Open Source - Eclipse Public License. You can also buy support contracts.
  • More Installation Options - Install to Hard Disk, run stateless (Diskless), run diskless with a little bit of state (Statelite), install to iSCSI (no special hardware required), virtual machines (VMWare, KVM, Xen, PowerVM, zVM)
  • Built in Automagic discovery - no need to power on one machine at a time to discover. Also, nodes that fail can be replaced and back in action by just powering them on

Get Started With xCAT

Go Further With xCAT

Security Notices

xCAT is developed under the Eclipse Public License.


Wiki: Alternative chains certificate forgery
Wiki: Bash vulnerablity CVE-2014-6271, CVE-2014-7169, CVE-2014-7186, CVE-2014-7187, CVE-2014-6277, and CVE-2014-6278
Wiki: Confluent_Main
Wiki: Debugging_xCAT_Problems
Wiki: Download_xCAT
Wiki: FREAK Attack
Wiki: For_The_xCAT_Developer
Wiki: Heartbleed bug vulnerability CVE-2014-0160
Wiki: HowTos
Wiki: Logjam vulnerability
Wiki: OpenSSL 1.0.2 ClientHello sigalgs DoS
Wiki: RC4 Bar Mitzvah Attack
Wiki: SSLv3 POODLE Attack CVE-2014-3566
Wiki: Tips_and_Tricks
Wiki: VENOM vulnerability
Wiki: Wish_List_for_xCAT_2
Wiki: XCAT_2.10_Release_Notes
Wiki: XCAT_2.6.10_Release_Notes
Wiki: XCAT_2.6.11_Release_Notes
Wiki: XCAT_2.6.6_Release_Notes
Wiki: XCAT_2.6.8_Release_Notes
Wiki: XCAT_2.6.9_Release_Notes
Wiki: XCAT_2.6_Release_Notes
Wiki: XCAT_2.7.1_Release_Notes
Wiki: XCAT_2.7.2_Release_Notes
Wiki: XCAT_2.7.3_Release_Notes
Wiki: XCAT_2.7.4_Release_Notes
Wiki: XCAT_2.7.5_Release_Notes
Wiki: XCAT_2.7.6_Release_Notes
Wiki: XCAT_2.7.7_Release_Notes
Wiki: XCAT_2.7.8_Release_Notes
Wiki: XCAT_2.7.9_Release_Notes
Wiki: XCAT_2.7_Release_Notes
Wiki: XCAT_2.8.1_Release_Notes
Wiki: XCAT_2.8.2_Release_Notes
Wiki: XCAT_2.8.3_Release_Notes
Wiki: XCAT_2.8.4_Release_Notes
Wiki: XCAT_2.8.5_Release_Notes
Wiki: XCAT_2.8_Release_Notes
Wiki: XCAT_2.9.1_Release_Notes
Wiki: XCAT_2.9_Release_Notes
Wiki: XCAT_Developer_Guide
Wiki: XCAT_Documentation
Wiki: XCAT_Features
Wiki: XCAT_OS_And_Hardware_Support_Matrix
Wiki: XCAT_Release_Notes
Wiki: XCAT_Support
Wiki: XCAT_Test_environment_Summary
Wiki: XCAT_iDataPlex_Cluster_Quick_Start
Wiki: Xcat_users