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    # Introduction
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    Welcome to Anselm supercomputer cluster. The Anselm cluster consists of 209 compute nodes, totaling 3344 compute cores with 15 TB RAM and giving over 94 TFLOP/s theoretical peak performance. Each node is a powerful x86-64 computer, equipped with 16 cores, at least 64 GB RAM, and 500 GB hard disk drive. Nodes are interconnected by fully non-blocking fat-tree InfiniBand network and equipped with Intel Sandy Bridge processors. A few nodes are also equipped with NVIDIA Kepler GPU or Intel Xeon Phi MIC accelerators. Read more in [Hardware Overview](hardware-overview/).
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    The cluster runs [operating system](software/operating-system/), which is compatible with the RedHat [Linux family.](http://upload.wikimedia.org/wikipedia/commons/1/1b/Linux_Distribution_Timeline.svg) We have installed a wide range of software packages targeted at different scientific domains. These packages are accessible via the [modules environment](environment-and-modules/).
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    User data shared file-system (HOME, 320 TB) and job data shared file-system (SCRATCH, 146 TB) are available to users.
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    The PBS Professional workload manager provides [computing resources allocations and job execution](resources-allocation-policy/).
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    Read more on how to [apply for resources](../general/applying-for-resources/), [obtain login credentials](../general/obtaining-login-credentials/obtaining-login-credentials/) and [access the cluster](shell-and-data-access/).