M3 User Guide

Partitions Available

Nodes belong to different partitions which allow corresponding jobs to run on them. There are two partitions on m3 at the moment:

The default partition is comp which consists of:

  • m3a: 21 nodes, each with 24 cores plus 128GB RAM

Other partitions

  • short:
    • use this when the jobs can be completed within ten minutes
    • two nodes, each with 24 cores, 100GB RAM
  • rtqp:
    • real-time partition to be used on demand
    • batch jobs shouldn’t be running here
    • use this partition only with two QoS, rtq and irq
    • ten nodes, a total of 412 cores, three nodes with V100 and one node with P100

Checking the status of M3

On M3, users can check the status of all nodes via the show_cluster command. The output of this command should be similar to:

$ show_cluster
    NODE            TYPE      PARTITION*         CPU     Mem (MB)   GPU/Phi         STATUS
                                              (Free)       (Free)    (Free)
    m3a000           CPU         m3a/all        (24)     (116588)     (N/A)       Reserved
    m3a001           CPU         m3a/all        (24)     (116588)     (N/A)       Reserved
    m3a002           CPU         m3a/all        (24)     (116588)     (N/A)       Reserved
    m3a003           CPU         m3a/all          24       116588       N/A           Idle
    m3a004           CPU         m3a/all          24       116588       N/A           Idle
    m3a005           CPU         m3a/all          24       116588       N/A           Idle
    m3a006           CPU         m3a/all          24       116588       N/A           Idle
    m3a007           CPU         m3a/all          24       116588       N/A           Idle
    m3a008           CPU         m3a/all        (24)     (116588)     (N/A)       Reserved
    m3d007           CPU         m3d/all           8        15614       N/A        Running
    m3d008           CPU             m3d           8        15614       N/A        Running

The STATUS field explained

The STATUS field can show:

  • Idle - Node is completely free. No jobs running on the node.
  • Running - Some jobs are running on the node but it still has available resources for new jobs.
  • Busy - Node is completely busy. There are no free resources on the node. No new jobs can start on this node.
  • Offline - Node is offline and unavailable due to a system issue.
  • Reserved - Node has been booked by other users and is ONLY available for them.