• Kevin Atkinson's avatar
    Add code to os_setup to log information about Image usage. · 979442f3
    Kevin Atkinson authored
    Enough information is logged so that, at any point in time,
    it is possible to tell what images are being used.  After
    collecting some stats for a while I hope to use this data to
    evaluate various strategies for preloading disks with images
    other than the default.
    
    Although not its primary purpose, enough information is
    collection to be able to get a snapshot of node usage at any
    point in time.  This includes what nodes are being used and by
    who, as in which experiments and thus which projects.
    
    NOTE: For a while you might see a few of these warnings,
      *** WARNING: os_setup:
      ***   could not find previous state (rsrcidx=484084) in image_history
      ***   table, won't be able to determine newly allocated nodes
    if someone does a swapmod to an experiment that was swapped in
    before this commit was installed.  This is because os_setup uses
    previous information in the table to determine newly allocated
    nodes.  This warning can safely be ignored in this case, and should
    go away over time.
    979442f3
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