Wayne State University

AIM HIGHER

Wayne State University

High Performance Computing Services

9. Utilizing Resources

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There are several resources that can be requested in the select statement:

  • cpu_model: The model of the processors (case sensitive)
  • 23544332HEE5-2620v3E5-2643E5-2640v3E5-2680v2E5-2695E5-2697v3E5345
    E5440E5450E5530X5550X5670X56806128 6282SE
  • cpu_speed: The speed of the processor in GHz
  • 2.02.12.22.32.4
    2.62.82.93.03.3
  • cpu_type: The type of processor, either AMD or Intel (case sensitive)
  • AMDIntel
  • mem: The amount of memory (RAM) needed (Default is 1GB of RAM)
  • ncpus: The number of cores needed (Default is 1 core)
  • net: The speed of network needed, 1Gb or 10Gb ethernet, or 20Gb or 56Gb Infiniband (case sensitive)
  • 1e10e20ib56ib
  • ngpus: The number of GPU needed
  • nphis: The number of Phi needed
  • vmem: The amount of virtual memory (real memory and swap) needed

For a list of the nodes and their resources visit the Grid Nodes page.

Examples:

Requesting Large Amounts of Memory:

Go to the Grid Nodes page and sort by Memory.

There are two sets of nodes available in the wsuq with 128GB of RAM, request 122 leaving 6GB for the system.

    #PBS -q wsuq
        #PBS -l select=1:mem=122GB

There are three sets of nodes available in the mwsuq with 256GB of RAM; request 250 leaving 6GB for the system.

#PBS -q mwsuq
        #PBS -l select=1:mem=250GB

Requesting the Fastest Processors:

Go to the Grid Nodes page and sort by Speed.

There are 160 nodes in the wsuq with 3.0GHz processors; request 3.0.

#PBS -q wsuq
        #PBS -l select=1:cpu_speed=3.0

There are two sets of nodes available in the mwsuq with 3.3GHz processors; request 3.3.

 #PBS -q wsuq
        #PBS -l select=1:ncpus=64:mpiprocs=60

Requesting Many Cores:

Go to the Grid Nodes page and sort by Cores.

There are 42 nodes available in the wsuq with 64 cores, request 64 ncpus and 60 mpiprocs leaving 4 for the system.

 #PBS -q wsuq
        #PBS -l select=1:ncpus=64:mpiprocs=60
Requesting a Specific Network:

Go to the Grid Nodes page and sort by Network.

There are many nodes with 10Gb ethernet, request 10e.

#PBS -l select=1:net=10e0
Requesting Specific Nodes:

Go to the Grid Nodes page and determine what nodes you want.

For instance, 64 core nodes in the wsuq connected over 10Gb ethernet.

#PBS -q wsuq
        #PBS -l select=4:ncpus=64:mpiprocs=60:net=10e

Or 3.0GHz nodes in the mwsuq connected over 1Gb ethernet.

#PBS -q mwsuq
        #PBS -l select=20:cpu_speed=3.0:net=1e

Or only nodes with AMD 2354 processors.

#PBS -l select=20:cpu_model=2354

Or wsu100 and wsu101 with 12 cores on each.

#PBS -l select=2:ncpus=12:mpiprocs=24:vnode=wsu100+vnode=101
Requesting a Specific Node:

#PBS -l select=1:vnode=vii1
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