checkpoint_techniques_on_compute_canada_clusters

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checkpoint_techniques_on_compute_canada_clusters [2015/03/30 14:26] – 132.216.122.26checkpoint_techniques_on_compute_canada_clusters [2024/03/26 13:52] (current) – external edit 127.0.0.1
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-These are the notes for the Checkpoint Techniques workshop I attended on March 26th, 2015. Might be useful for people who want to learn how to code this on their own programs. Please don't hesitate to edit this page if you feel I left something out, you want to add something on your own or my English sounds funny.+These are the notes for the Checkpoint Techniques workshop I attended on March 26th, 2015 (the workshop materials can be found [[http://www.hpc.mcgill.ca/index.php/training#chkpt|here]].) Might be useful for people who want to learn how to code this on their own programs. Please don't hesitate to edit this page if you feel I left something out, you want to add something on your own or my English sounds funny.
  
 ===== Random stuff ===== ===== Random stuff =====
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 # 7779 by default, but if there are several DMTCP schedulers running on  # 7779 by default, but if there are several DMTCP schedulers running on 
 # the same node we will have problems. The best solution is to assign the # the same node we will have problems. The best solution is to assign the
-# port number manually.+# port number manually. Also, if PORT=0, a random unused port will be  
 +# chosen, which is probably better.
 PORT=7745 PORT=7745
  
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 # New version of this script. Now we use DMTCP to launch # New version of this script. Now we use DMTCP to launch
-# the scripts (and gnu-parallel).+# the scripts.
  
 def chunks(l, n): def chunks(l, n):
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 </file> </file>
  
-In the end, this script generates a bunch of ''.sh'' files (as many as needed), splits the input files in chunks of ''NPROCS'' within the same node and makes the scripts executable. The only thing needed afterwards is to check that all the parameters are correct and ''qsub'' them. It will use the personal project space (hardcoded, you will need to change this) to create task subdirectories for DMTCP. +In the end, this script generates a bunch of ''.sh'' files (as many as needed), splits the input files in chunks of ''NPROCS'' within the same node and makes the scripts executable. The only thing needed afterwards is to check that all the parameters are correct and ''qsub'' them. It will use the personal project space (hardcoded, you will need to change this) to create task subdirectories for DMTCP. 
 + 
 +**Currently this is not working as expected; for some unknown reason, only 2 random jobs get re-started. I have contacted Calcul Québec about this and they should reply shortly. I will update this page with a bug-free script (or whatever solution they give me.)**  
 + 
 +**Update 2: they did not reply.**
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