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Multiple nodes vs multiple cores

    Question

  • Hello. I am totally new to HPC world and have a basic question. For running HPC Excel jobs (workbook offloading), are 10 compute nodes (made of 10 independent servers with, say 1GB RAM each) better than 2 compute nodes (2 independent servers with 5 cores (processors) each, where each core has 1 GB RAM)? This question arises because for the first option (10 servers), I need to have 10 Excel licenses whereas for the second option (2 servers), I think I can do with just 2!

    Thanks in advance.

    Tuesday, March 01, 2016 10:31 AM

Answers

  • Hi KMLN,

    This mostly depends on the total number of cores for the computing capacity of all the compute nodes and the RAM size for each core in the cluster. E.g. if there are 10 1-core 1G-RAM servers and 1 10-core 10G-RAM server (suppose the cores/RAM are the same type), the performance for the Excel workload should be almost the same. The latter may slightly win if the network communication cost in the cluster is considered.

    BR,

    Yutong Sun

    • Marked as answer by KMLN Wednesday, March 02, 2016 1:37 PM
    Wednesday, March 02, 2016 4:35 AM