Compute Node Linux
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Compute Node Linux (CNL) is a runtime environment based on the Linux kernel for the Cray XT3, Cray XT4, Cray XT5, Cray XT6, and Cray XE6 supercomputer systems based on SUSE Linux Enterprise Server.[1][2] CNL forms part of the UNICOS/lc operating system from release 2.0 onwards (UNICOS/lc was later renamed Cray Linux Environment). As of November 2011[update] systems running CNL were ranked 3rd, 6th and 8th among the fastest supercomputers in the world.[3]