Version 10 (modified by carlos, 9 years ago) (diff)


How to add Neptuno facilities to WRF4G

WRF4G uses DRM4G to access to different Distributed Resource Managements (DRM) such as:

  • PBS/Torque
  • SGE
  • FORK
  • LoadLeveler

In order to add new resources, you need to edit Computing Resources section in the framework4g.conf file, which is located under $HOME/WRF4G/etc directory. The file has to contain one resource per line with the format:

   resource_name  = attributes
   ...     ...
   resource_name  = attributes


  • resource_name: It is the name of the CR.
  • attributes: They are the static attributes of the CR. The syntax is:
    • <scheme>://<username>@<host:port>?<query>
      • scheme: URL schemes available are "ssh" and "local".
        • ssh: In order to connect to remote resource via SSH
        • local: In order to use a local resource
      • username: user name on the resource
      • host: host name
      • port: host port. By DEFAULT it is 22
      • query: contains additional information of computing resources. The query string syntax is:
        • key1=value1;key2=value2;key3=value3

The keys available are:

  • LRMS_TYPE(mandatory): Type of LRMS system (neptuno)
  • NODECOUNT(mandatory): Maximum number of job slots for a resource.
  • SSH_KEY_FILE(optional): It defines the key file for "ssh" connection. By DEFAULT it is ~/.ssh/id_rsa.
  • TEMP_DIR(optional): Temporary directory on the resource to store data. By DEFAULT it is $HOME. TEMP_DIR path must be absolute.
  • RUN_DIR(optional): Temporary directory used to run WRF Model on the resource. By DEFAULT it is $HOME. RUN_DIR path must be absolute.

Example of configuration:

neptuno =  ssh://userid@;NODECOUNT=1500

If you want to configure Neptuno facilities using ssh protocol, you need to set up SSH login without password (see Appendix B) between MACC cluster and Neptuno, and vice-versa.

After modifying ComputingResources section, WRF4G takes few seconds in order to update the changes

In addition, you need to update WRF4G_BASEPATH, WRF4G_DOMAINPATH, WRF4G_INPUT and WRF4G_APPS variables, which are defined in resources.wrf4g file. Due to the fact that these variables may point to other machines. See running environment for more information.

Example of configuration:


Neptuno Running Options


Number of processors requested in a parallel job. Note that it has to be enough resources to run. For example, if we only configure 1 processor (NODECOUNT=1) of a computer in framework4g.conf, WRF4G can not submit an experiment demanding NP=2.

If you are going to use PBS/Torque or SLURM resources, it is also highly recommendable to use PPN variable in order to indicate the number of processors available per node. For example, NP = 4 and REQUIREMENTS = 'PPN = 4' which means 4 processors on one node


Requirements asked to the CRs where the experiment is going to run (for more information see advanced configuration). For example, REQUIREMENTS ='HOSTNAME = "mycomputer"'.


Experiment environment variables are configuration options for the jobs (for more information see advanced configuration). For example, ENVIRONMENT = 'WALLTIME = 01:00:00' (one hour of max walltime).