wiki:WikiStart

Version 65 (modified by ros, 7 years ago) (diff)

Welcome to the NCAS Computational Modelling Services Website

Update: ARCHER Transition - Modifying PPTransfer

ARCHER has now been configured to allow outgoing connections from the post-processing nodes. This means that it is possible again to transfer data to JASMIN by pushing from ARCHER in the same way that we did from the RDF.

UM suites need to be modified to stage data for archiving on the /work disk and configured to run the pptransfer task in the ARCHER serial queue. You will also need to setup ssh-agent on both the post-processing nodes espp1 & espp2 to connect to JASMIN.

Full instructions on how to modify a UM suite can be found on our website

Update: ARCHER return to service - UM work flow

We continue to work with ARCHER to implement a robust solution to handle the 2FA access. Until we have that solution, this is a short-term alternative. In your PUMA or pumatest .ssh/config file (create one if you don't already have one), delete references to login.archer.ac.uk and then add:

Host login.archer.ac.uk
User <your ARCHER username>
IdentityFile ~/.ssh/<your private key to ARCHER>
ControlMaster auto
ControlPath /tmp/ssh-socket-%r@%h-%p
ControlPersist yes

Login to ARCHER (with passphrase and password).

Rose/Cylc suites should not use rose host-select - it will not work; suites must specify login.archer.ac.uk in the appropriate .rc file (suite.rc or archer.rc), for example, host = login.archer.ac.uk

Submit UMUI and Rose/Cylc jobs as usual.

The connection to ARCHER will persist after logging out of PUMA/pumatest and will enable the Cylc engine to manage your suite. However, the connection will be terminated (each day at ~5AM in our experience) - logging in to ARCHER will re-establish the connection and Rose/Cylc suites will pick up automatically. If a suite times out (over a weekend possibly), a normal rose suite-restart should get it going again.

ARCHER return to service - UM work flow

When ARCHER returns to operation on May 21st all users will be required to use two credentials to access the service: an SSH key with a passphrase and their ARCHER password.

Rose/Cylc suites and UMUI jobs will not run under this HPC access model. We are working closely with ARCHER to develop and implement a solution that will enable UM work flows to function with the new security scheme.

ARCHER Transition - Modifying PPTransfer

From February 19th the ARCHER RDF will become read-only. This means that to continue archiving and transferring data to JASMIN UM suites will need to be modified to stage data for archiving on the /work disk as well as modifying the pptransfer app to pull the data across from JASMIN rather than using the ARCHER data transfer nodes.

Full instructions on how to modify a UM suite can be found on our website

Single Column Model available in UM VM

The SCM can be run inside the Met Office's UM Virtual Machine. See SCMVM for instructions.

NCAS-CMS provides information services and support for modelling in the ac.uk atmospheric science community.


The CMS Modelling Helpdesk is now located here: CMS Helpdesk