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== Choosing a node type == <!--T:27--> | == Choosing a node type == <!--T:27--> | ||
A number of nodes are reserved for jobs that require whole nodes. These are all 48-core nodes, i.e., '''there are no 32-core nodes set aside for whole node processing. If the job asks for 32 tasks per node, it will be moved into of the bycore partitions and consequently (most likely) will end up running on a 48-core node'''.<br> | |||
Most applications will run on either Broadwell or Skylake or Cascade Lake nodes, and performance differences are expected to be small compared to job waiting times. Therefore we recommend that you do not select a specific node type for your jobs. If it is necessary, use <code>--constraint=cascade</code>, <code>--constraint=skylake</code> or <code>--constraint=broadwell</code>. If the requirement is for any AVX512 node, use <code>--constraint=[skylake|cascade]</code>. See [[Running_jobs#Specifying_a_CPU_architecture|Specifying a CPU architecture]]. | Most applications will run on either Broadwell or Skylake or Cascade Lake nodes, and performance differences are expected to be small compared to job waiting times. Therefore we recommend that you do not select a specific node type for your jobs. If it is necessary, use <code>--constraint=cascade</code>, <code>--constraint=skylake</code> or <code>--constraint=broadwell</code>. If the requirement is for any AVX512 node, use <code>--constraint=[skylake|cascade]</code>. See [[Running_jobs#Specifying_a_CPU_architecture|Specifying a CPU architecture]]. | ||