XCAT

xCAT is open-source distributed computing management software developed by IBM, used for the deployment and administration of Linux or AIX based clusters.
In September 2023 the primary developers of xCAT said that they moved onto other roles and could no longer work on it, asking the community if anyone would like to take over, as otherwise they planned to end-of-life the project on December 1, 2023. A consortium of companies organized to take over the development, later releasing version 2.17.

Toolkit

xCAT can:

Create and manage diskless clusters
Install and manage many Linux cluster machines in parallel
Set up a high-performance computing software stack, including software for batch job submission, parallel libraries, and other software that is useful on a cluster
Cloning and imaging Linux and Windows machines

xCAT has specific features designed to take advantage of IBM hardware including:

xCAT achieved recognition in June 2008 for having been used with the IBM Roadrunner, which set a computing speed record at that time. xCAT is the default systems management tool of the IBM Intelligent Cluster solution.
xCAT is sometimes used by Lenovo, along with their own deployment system, Confluent.