Version 3 (modified by annette, 6 years ago) (diff)

HadGEM3-A GA3.0 (xgvha)

Job overview

This is a HadGEM3 atmosphere-only job at N96 global resolution with 85 vertical levels, at UM version 7.8.

It is based on the Met Office job akqga. The collaboration wiki has more information on akqga and the HadGEM3 job evolution.

This job has been set up to run on the HECToR Phase 3 system.

Running the job

Using the UMUI, take a copy of the job configuration xgvha.

Before submitting the job it is essential that you change some basic settings, by going to the following UMUI windows:

  1. User Information and Submit Method → General Details

Set your Userid, Email Address and Tic Code

  1. FCM Configuration → FCM Extract directories and Output levels

Set an appropriate value for "Target machine root extract dir (UM_ROUTDIR)".
This is a directory on HECToR, typically /home/n02/n02/<userid>

  1. Input/Output Control and Resources → Time Convention and SCRIPT Environment Variables

Check that the settings for $DATAW and $DATAM are as you require.

This job is set up to run for 10 days on 128 cores (4 nodes).

Save, Process and then Submit your job.

Input data files

PUMA files are stored here: /home/umui/hadgem3/vn7.8/HG3AGA30

HECToR files are stored here: /work/n02/n02/hum/vn7.8/HG3AGA30

Known issues

Fixes included in the standard job. These issues were found when porting this job from the Met Office supercomputer to HECToR.

  1. STASH items:
    The following items cause the model to crash:
    (1,235) TDAY30yr, DIAG, UPD, package R
    (2,207) TDAYM, DIAG, UPD, package R

This is fixed with branch:

fcm:um_br/dev/annette/VN7.8_rad_diagfix_ukmo/src   8619
  1. Diagnostics bug:
    The following branch needs to be included:
    fcm:um_br/dev/annette/VN7.8_diagnostics_bl_fix/src   1851

Otherwise the model crashes with certain domain decompositions.

Porting and testing notes

Installation instructions for the Vn7.8 HadGEM3-A GA3.0 package provided by the Met Office are given here (requires registration).

Notes on the porting process and original testing done on Phase 2b given here, along with some timing runs for Phase 3.