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computing:department:unix:jobs:home

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computing:department:unix:jobs:home [2009/01/29 19:23] – allancomputing:department:unix:jobs:home [2013/07/17 16:41] (current) – [I/O intensive jobs] allan
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 If "yourprogram" is your executable, then you can run it nicely using the command: If "yourprogram" is your executable, then you can run it nicely using the command:
  
 +  # tcsh shell users:
   nice +n yourprogram   nice +n yourprogram
 +
 +  # bash shell users:
 +  nice -n yourprogram
  
 where n is a number between 1 and 19 (the higher the number, the lower the job priority). where n is a number between 1 and 19 (the higher the number, the lower the job priority).
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 You should choose the priority in the most socially-responsible way you can manage, according to how long you expect the job to run - eg, jobs which may run for days should be run at a lower priority than those which might only take a few hours. We also consider a priority of 4 to be the minimum socially-acceptable nice level to use for background jobs - so, for example: You should choose the priority in the most socially-responsible way you can manage, according to how long you expect the job to run - eg, jobs which may run for days should be run at a lower priority than those which might only take a few hours. We also consider a priority of 4 to be the minimum socially-acceptable nice level to use for background jobs - so, for example:
  
 +  # tcsh shell users:
   nice +4 yourprogram   nice +4 yourprogram
  
 +  # bash shell users:
 +  nice -4 yourprogram
  
 ===== I/O intensive jobs ===== ===== I/O intensive jobs =====
  
-If your job requires manipulation of large files, it will be faster to use local scratch storage on the local machine rather than your home directory (which is accessed over the network). Check our pages on [[:computing:department:unix:file_storage|file storage]] to see where you can store such files.+<note>Please make sure you don't send intensive writes to your home directory, as this causes slowdowns for all other users on our system. We may be forced to kill any processes which are causing such problems</note> 
 + 
 +If your job requires manipulation of large files (especially writing to them), it will be faster to use local scratch storage on the local machine rather than your home directory over the network. Check our pages on [[:computing:department:unix:file_storage|file storage]] to see where you can store such files.
  
computing/department/unix/jobs/home.1233278610.txt.gz · Last modified: 2009/01/29 19:23 by allan

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