Node Usage Statistics



Node Usage Statistics

This page allows LDAS users to obtain a graphical view of the number of nodes allocated per job within a specified time.

  1. Check Node Usage vs time button.
  2. Specify the time ranges: one easy way is to select one of the time options: last minute, last hour, last day to get some time in the entry fields and then modify the times to your desire range.
  3. Submit request to server by hitting the SUBMIT button.
  4. Response:

    A graph window popups up with each point representing the number of nodes allocated by an MPI job.

    Node Usage Histogram

    This page allows LDAS users to obtain a histogram of nodes allocated vs the number of jobs.

    1. Check Histogram button and select a bin size if desired. The bin size specifies the range of counters. A size of 1 allows each node to have its own counter.
    2. Specify the time ranges: one easy way is to select one of the time options: last minute, last hour, last day to get some time in the entry fields and then modify the times to your desire range.
    3. Submit request to server by hitting the SUBMIT button.
    4. Response:

      A histogram is displayed showing counts of total jobs per node ( bin size = 1 ).

      You can select options Log Y to change the scaling of the graph or select cumulative plot of the percent of jobs vis number of nodes allocated.

    Beowulf Node Usage summary

    This page allows LDAS users to obtain a graphical view of the load on the beowulf nodes processing LDAS jobs.

    1. Select specific DSOs or all DSOs.
    2. Select specific users or all users.
    3. Specify the time ranges: one easy way is to select one of the time options: last minute, last hour, last day to get some time in the entry fields and then modify the times to your desire range.
    4. Submit request to server by hitting the SUBMIT button.
    5. Response:

      A graph window popups up with each point representing the product of the number of nodes used by a job and the wrapper runtime. The following statistics are also computed :

      1. Average job load per job
      2. Sum of all the job load
      3. Load efficiency as Sum / ( #nodes on system * time period selected )