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--- cluster:managing_jobs [2018/10/02 13:23] – created support
+++ cluster:managing_jobs [2024/11/11 20:30] (current) – external edit 127.0.0.1
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 ======Managing Jobs======
-=====Managing Jobs on the Cluster=====
-The above commands work well when you have not logged out of the cluster while running the job.  Because of the cluster's [[Hardware_Configuration|setup]], there are many nodes that could be running your job.  When you log in to <code>cluster.econ.umd.edu</code>, you are automatically sent to a particular node <code>econ0</code> through <code>econ5</code>.  This might not be the same node that is running your job.
-One way to get to the node that has your job is log in and then go to the particular node like:
- <code>ssh econ3</code>
-And then to see processes that are running under your username in this node:
- <code>ps -ux</code>
-There are also special cluster tools to manage jobs between nodes.  You can use the command
- <code>cluster-ps</code>
-This returns a list of processes on each node that are associated with your user id. (As of 2014-06-26 it only works for econ0-5.)  You can choose a process to kill by noting the node and process id ('PID' in the cluster-ps output) and then using the command
- <code>cluster-kill -n <node> -p <PID></code>
-======Renice-ing=====
-You can change how many CPU cycles are given to your job by using the command <code>renice</code>.  Once you know the process id, you can use the command:
- <code>renice -n <priority> -p <process id></code>
-to change the [[nice]]ness of your process.  If you are running a computationally intensive job, please set your job to a high niceness level, so that you don't monopolize cluster resources :)
 =====General Job Management=====
-Once you have a job running, you might want to change it's priority (<code>renice</code>) or stop it.  To check on the list of running jobs, use the command <code>top</code>.
+Once you have a job running, you might want to change its priority or stop it.  To check on the list of running jobs, use the command <code>htop</code>
-[[http://unixhelp.ed.ac.uk/CGI/man-cgi?top|Top]] is an interactive program that dynamically lists processes running on the server.  Pressing '?' will get you to a help page.  Pressing 'q' gets out of the help page, and also quits top altogether.
 You can also see all running jobs statically with
@@ Line 36: / Line 16: @@
 Alternatively, press 'q' to stop top.  Then, type use the <code>kill</code> command.
  <code>kill <process id></code>
+======Renice-ing=====
+You can change how many CPU cycles are given to your job by using the command <code>renice</code>.  Once you know the process id, you can use the command:
+ <code>renice -n <priority> -p <process id></code>
+to change the niceness of your process.  If you are running a computationally intensive job, please set your job to a high niceness level, so that you don't monopolize cluster resources :)