Changes between Version 24 and Version 25 of cypress/about


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Timestamp:
Mar 13, 2015 11:42:51 AM (7 years ago)
Author:
hoang
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  • cypress/about

    v24 v25  
    9797== Requesting memory for your job ==
    9898
    99 If your jobs require a significant amount of memory (approximately more than 16 GB per node), it is recommended that you explicitly request the amount of memory desired.  To do this, use the `--mem` option of sbatch and specify the number of megabytes (MB) of memory per node required.  For example, in your sbatch script, you would include the following line to request 32 GB of memory per node:
    100 
    101 {{{
    102 #SBATCH --mem=32000
    103 }}}
    104 
    105 You can request up to 64 GB of memory per node for your jobs in this way.
    106 
    107 If your jobs require more than 64 GB of memory per node, we have some large memory nodes in an experimental stage that are available for testing.  To use these large memory nodes, you will need to add to your job a request for the "bigmem" partition.  You would use the following to request 128 GB of memory per node (this is the maximum available at this time):
     99Our standard nodes on Cypress will allow you to use 3.2 GB of memory per core (64 GB per node).  This should be sufficient for many types of jobs, and you do not need to do anything if your job uses less than this amount of memory.  If your jobs require more memory to run, use the `--mem` option of sbatch to request a larger amount of memory.  Specify the number of megabytes (MB) of memory per node required.  For example, in your sbatch script, you would include the following line to request 128 GB of memory per node:
    108100
    109101{{{
    110102#SBATCH --mem=128000
    111 #SBATCH --partition=bigmem
    112103}}}
    113104
    114 Due to the very limited number of large memory nodes at this time, only the "interactive", and "normal" QOS's are available when using the "bigmem" partition.
     105This is the maximum memory per node you can request at this time.  We have a limited number of large memory nodes, so please only request a larger amount of memory if your job requires it.
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    116107