Login to ECMWF Cray

Each participant will have a training user account on the ECMWF Cray system. This is different from the user account on the classroom computers.

Begin by logging onto the Cray login nodes:

ssh trcrayXX@ccb                        <<< use your Cray user id
Password: xxxxxxxx

trcray@ccb-login2:~>

The contents of the account should look like:

trcray1@ccb-login2:~> ls
bin  modules.sh  oifs38r1  scratch

If any are missing please let us know.

Directory: oifs38r1

This directory contains the OpenIFS source code and OpenIFS executable.

For the purpose of this workshop, the model has already been compiled to avoid delay and adding unnecessary load to the login nodes.

Examine the files in the oifs38r1 directory.

Directory: scratch

This is the directory in which we will run OpenIFS.

Setting the correct environment

Each time you login and before doing any work in this account, make sure you have the correct environment loaded to run and work with OpenIFS.

source modules.sh

Creating the OpenIFS ensemble experiment

Using : createENS .....

Control forecast : cf000

perturbed forecast : pf001

You will run the perturbed forecast (you can run the control later)

Creating the OpenIFS batch job

Using : oifs_run .....

 

Editing the namelist

cp namelistfc fort.4

Edit namelist for your perturbation number.

 

Submit job: qsub jobN

Checking job status: qstatu

 

Problems (deliberate)

Set length of run to d10 - model will stop and print error that the climate file is too short.