cc_staff
111
edits
Cedar: Difference between revisions
Jump to navigation
Jump to search
Simplify by-node/by-core explanation
No edit summary |
(Simplify by-node/by-core explanation) |
||
| Line 98: | Line 98: | ||
== Choosing a node type == <!--T:27--> | == Choosing a node type == <!--T:27--> | ||
A number of nodes are reserved for jobs that require whole nodes. | A number of 48-core nodes are reserved for jobs that require whole nodes. There are no 32-core nodes set aside for whole node processing. '''Jobs that request less than 48 cores per node can end up sharing nodes with other jobs.'''<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]]. | ||