Trying to get a login-4c job to work on the new login nodes on ARCHER2

1

I am trying to change a suite which was previously working on ARCHER2 on the login-4c nodes (u-ch469) to work on the new full system.
I changed the host name in site/archer2.rc to login.archer2.ac.uk
and changed the .ssh/config file to
Host login*.archer2.ac.uk

I had some issues with the ssh connection from puma to ARCHER2 but they now seem resolved.

I then submitted the suite and got several error messages like:
Lmod has detected the following error: The following module(s) are unknown:
“epcc-job-env”
Suspecting that this was an issue with the site/archer.rc file I replaced it with an example file.
cp /home/um/archer2/archer2.rc_ukesm site/archer2.rc
and tried again.

The errors are now:
Lmod has detected the following error: The following module(s) are unknown:
“GC3-PrgEnv/2.0/2020.11.26”

Could you please advise what I need to change to get this to work.
Many thanks,
Andrew

2

Hi Andrew,

You need to update the Science Configuration Module name in your suite to: GC3-PrgEnv/2.0/2021.12.15

Regards,
Ros.

3

Great thanks, that worked fine.
Its now failing because it cannot access the files in my login-4c /work/n02/n02 space.
Do I need to copy everything over to the new filesystem? And if so how is the easiest way to do this?
Thanks
Andrew

4

Andrew

You should have received this message from ARCHER:

Dear ARCHER2 Users,

A reminder that the ARCHER2 4-Cabinet system will be removed from service today (Monday 10th January) at 12:00 GMT. After this time you will no longer be able to use the ARCHER2 4-Cabinet system.

Grenville

5

Hi Grenville,
Thanks for this, I managed to get the files moved over to the new system.

I’ve got this to compile and run.

But I have now got this error in the postproc_nemo task:
slurmstepd: error: Detected 1 oom-kill event(s) in StepId=955971.batch cgroup. Some of your processes may have been killed by the cgroup out-of-memory handler.

Any idea what could have caused this?
Thanks
Andrew

6

Andrew

Try adding

[[[directives]]]
            --mem=25G

in the [POSTPROC_RESOURCE] section in archer2.rc

Grenville

7

That worked. And my suite now successfully runs on the full system.
Thanks
Andrew