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In this tutorial, and throughout the entire workshop, you will use one of the Cray XC40 computers which are part of the ECMWF's high-performance computing facility (HPCF).
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title | Tasks - Connect to HPCF |
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- Start the Mobaxterm application and open a local terminal
- Login to the RACC using
ssh -X cluster.act.rdg.ac.uk On the cluster type the command: ssh troifsX@ecaccess.ecmwf.int Note: Instead of troifsX you should use your ECMWF training user-ID - You will be prompted for the hostname with a choice between
ecgate , cca and ccb . You should select ccb . - When you have completed your work you can disconnect from
ccb by typing exit at the command prompt at the command prompt.
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The following tasks need to be carried out only once in order to set up the training accounts and the OpenIFS 43r3 model.
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title | Tasks - Set up training account - do this only once after the first login |
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- After the first login type the following command:
/home/ectrain/troifs0/setup-cray/my43 - Log out of the training account by typing
exit Login once more using ssh troifsX@ecaccess.ecmwf.int - Type the following command:
get43
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The actions above will ensure that your training account receives required scripts and shell configuration files.
The last command will copy the model binaries and input files to your account for version 43r3.
Instead of using the login nodes of the HPCF we will use an interactive session to ask for computing resources and fast temporary disk. This also allows to run parallel jobs in the terminal window.
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title | Tasks - Start interactive session |
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% qsub -I -q d f -l EC_total_tasks=6 6 -l EC_job_tmpdir=10G 10G -l EC_memory_per_task=2G
qsub: waiting for job 7215630.ccbpar to start
qsub: job 7215630 .ccbpar ready
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The changed command line prompt indicates that we have switched from the login node to a pre/post-processing node.
You can
Important: After completing your work you need to close the interactive session by typing exit
which will bring you back to the login node.
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title | Tasks - Set OpenIFS environment |
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- Carry out the tasks above to connect to
ccb and start an interactive session - Type the command: setup-43r3
- Change into the model's main directory:
cd perm/oifs43r3 - Type the command:
source ./oifs-config.ccb.sh
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The oifs-config.ccb.sh
The setup-43r3
script sets a number of Unix shell environment variables which define the type of OpenIFS compiled installation and location of files. These settings are specific to version 43r3.
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