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The authors present a heterogeneous multi-accelerator cluster developed and deployed at NCSA. The cluster consists of 16 AMD dual-core CPU compute nodes each with four NVIDIA GPUs and one Xilinx FPGA. Cluster nodes are interconnected with both InfiniBand and Ethernet networks. The software stack consists of standard cluster tools with the addition of accelerator-specific software packages and enhancements to the resource allocation and batch sub-systems. They highlight several HPC applications that have been developed and deployed on the cluster. They also present the Phoenix application development framework that is meant to help with developing new applications and migrating existing legacy codes to heterogeneous systems.
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